15,204 results match your criteria photoperiod


Haplotype variations of major flowering time genes in quinoa unveil their role in the adaptation to different environmental conditions.

Plant Cell Environ 2021 Apr 20. Epub 2021 Apr 20.

Plant Breeding Institute, Christian-Albrechts-University of Kiel, Kiel, Germany.

Response to photoperiod is of major importance in crop production. It defines the adaptation of plants to local environments. Quinoa is a short day plant which had been domesticated in the Andeans regions. Read More

View Article and Full-Text PDF

Plant-derived melatonin from food: a gift of nature.

Food Funct 2021 Apr 1;12(7):2829-2849. Epub 2021 Apr 1.

College of Enology, College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.

In recent years, people have become increasingly interested in bioactive ingredients from plants, especially antioxidant molecules such as melatonin, which are beneficial to human health. The purpose of this article is to provide new information on plant-derived foods with a high content of melatonin. We comprehensively summarize the content of melatonin in plant-derived foods and discuss the factors that influence melatonin levels to provide new ideas on enhancement. Read More

View Article and Full-Text PDF

First Report of Meloidogyne graminicola on Rice in Henan Province, China.

Plant Dis 2021 Apr 20. Epub 2021 Apr 20.

Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road No.2,, Beijing, China, 100193;

Rice (Oryza sativa) is an important food crop in China and root-knot nematode Meloidogyne graminicola has been one of the most important diseases on rice in recently five years (Ju et al. 2020). In August 2020, rice plants were found to be maldeveloped, yellow leaves and hooked root tips in an irrigated paddy field of Yuanyang County, Xinxiang City, Henan Province. Read More

View Article and Full-Text PDF

Photosynthesis in a sub-Antarctic shore-zone lichen.

New Phytol 2001 Feb;149(2):291-299

Data Analyse Ecologie, Dwarsdrift 24, 7981 AP Diever, The Netherlands.

•  Photosynthetic responses to moisture, light, temperature, salinity and inorganic nitrogen fertilization are reported for a shore-zone lichen Turgidiusculum complicatulum (formerly Mastodia tesselata), a possible recent introduction to sub-Antarctic Marion Island. •  Optimum moisture contents for net photosynthesis were 225-346% (ash free, dry mass). Net CO exchange was dominated by a strong temperature dependence of respiration rate. Read More

View Article and Full-Text PDF
February 2001

O -induced degradation of Rubisco protein and loss of Rubisco mRNA in relation to leaf age in Solanum tuberosum L.

New Phytol 1994 Aug;127(4):741-748

Graduate Program in Plant Physiology, and Department of Plant Pathology and The Environmental Resources Research Institute, The Pennsylvania State University, 211 Buckhout Laboratory, University Park, PA 16802, USA.

The effect of ozone (O ) on Rubisco degradation was investigated by dark incubation of potato plants (Solanum tuberosum L. cv. Norland) following exposure to charcoal-filtered air or 0. Read More

View Article and Full-Text PDF

Control of flowering and reproduction in temperate grasses.

Authors:
O M Heide

New Phytol 1994 Oct;128(2):347-362

Department of Biology and Nature Conservation, Agricultural University of Norway, P.O. Box 5014, N-1432 ÅRs, Norway.

Temperate grasses of the subfamily Festucioideae can be grouped into two main categories according to their environmental control of flowering, species with regular long day (LD) induction, and those with dual induction requirements. The former group includes the temperate annual crosses and a few perennial species such as Phleum pratense and Poa nemoralis. These species base no winter requirement and require only LD to flower. Read More

View Article and Full-Text PDF
October 1994

Responses of growth, photosynthesis, and leaf conductance to white light irradiance and end-of-day red and far-red pulses in Fuchsia magellanica Lam.

New Phytol 1991 Mar;117(3):461-471

Departamento de Ecología, Facultad de Agronomia, Universidad de Buenos Aires, 1417 Buenos Aires, Argentina.

The response of Fuchsia magellanica Lam. - a shade-tolerant perennial - to white light photon flux density and end-of-day red and far-red light irradiation was studied to evaluate the role that different morphological and functional alterations play in whole-plant acclimation to shade. The estimated relative growth rate of plants growing under a photon flux density of 30μmol m s was 71 % of that of those growing under 450μmol m s . Read More

View Article and Full-Text PDF

The influence of photoperiod on incorporation of precursors into tocopherols and plastoquinone in Xanthium strumarium L.

New Phytol 1989 Mar;111(3):397-401

School of Biological Sciences, University College of North Wales, Bangor, Gwynedd, LL57 2UW, UK.

Radioactivity from tyrosine applied to leaves of Xanthium strumarium L. was incorporated into α- and γ-tocopherol and plastoquinone. Time-course studies on vegetative plants showed that γ-tocopherol was rapidly labelled and turned over, while α-tocopherol showed no sign of turnover. Read More

View Article and Full-Text PDF

Short photoperiods induce fructan accumulation and tuberous root development in Dahlia seedlings.

New Phytol 2001 Mar;149(3):449-454

Department of Horticulture, Clemson University, Clemson, South Carolina 19624, USA.

• The effect is reported here of photoperiod on fructan accumulation in the tuberous roots of Dahlia sp. cv. Sunny Rose seedlings. Read More

View Article and Full-Text PDF

Anthropogenic alteration of flow, temperature, and light as life-history cues in stream ecosystems.

Integr Comp Biol 2021 Apr 19. Epub 2021 Apr 19.

Freshwater Research Institute, Susquehanna University, 514 University Avenue, Selinsgrove, Pennsylvania, USA.

Life history events, from mating and voltinism to migration and emergence, are governed by external and historically predictable environmental factors. The ways humans have altered natural environments during the Anthropocene have created myriad and compounding changes to these historically predictable environmental cues. Over the past few decades, there has been an increased interest in the control temperature exerts on life history events as concern over climate change has increased. Read More

View Article and Full-Text PDF

Functional analysis and expression patterns of members of the FLOWERING LOCUS T (FT) gene family in Lilium.

Plant Physiol Biochem 2021 Apr 5;163:250-260. Epub 2021 Apr 5.

Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, 100083, China. Electronic address:

Lilium is an important commercial flowering species, and there are many varieties and more than 100 species of wild Lilium. Lilium × formolongi is usually propagated from seedlings, and the flowering of these plants is driven mainly by the photoperiodic pathway. Most of the other lily plants are propagated via bulblets and need to be vernalized; these plants can be simply divided into pretransplantation types and posttransplantation types according to the time at which the floral transition occurs. Read More

View Article and Full-Text PDF

Importance of Photic Constraints Depends on the Population.

Trends Ecol Evol 2021 Apr 14. Epub 2021 Apr 14.

Greenland Institute of Natural Resources, 3900 Nuuk, Greenland; Arctic Ecosystem Ecology, Department of Bioscience, Aarhus University, 4000 Roskilde, Denmark. Electronic address:

View Article and Full-Text PDF

Role of changes in plasma prolactin concentrations on ram and buck sperm cryoresistance.

Domest Anim Endocrinol 2021 Mar 18;76:106624. Epub 2021 Mar 18.

Departamento de Reproducción Animal, INIA, 28040 Madrid, Spain.

Seasonal endocrine changes may modify sperm cryoresistance in certain small ruminant species. The present work examines the effect of prolactin (PRL) on ram and buck sperm cryoresistance. A dopamine agonist (bromocriptine [BCR] 60 mg i. Read More

View Article and Full-Text PDF

Red and blue wavelengths affect the morphology, energy use efficiency and nutritional content of lettuce (Lactuca sativa L.).

Sci Rep 2021 Apr 16;11(1):8374. Epub 2021 Apr 16.

Beijing Research Center of Intelligent Equipment for Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China.

Since red (R) and blue (B) LED light has different quantum efficiency and photoelectric conversion efficiency, mixed RB with different proportions of R and B results in varied energy consumption. In order to improve the energy use efficiency of the closed-type plant production systems, the effects of R and B proportions on the electric use efficiency (EUE), light use efficiency (LUE) as well as the quality of butter leaf lettuce were evaluated in this study. Lettuce seedlings were cultivated in a plant factory with artificial lighting (PFAL) and subjected to eleven combinations of R and B (100%R, 90%R, 80%R, 70%R, 60%R, 50%R, 40%R, 30%R, 20%R, 10%R, 0%R; the rest of the photons in each treatment were B) with the same total photosynthetic photon flux density (PPFD) and photoperiod (200 ± 3 μmol·m·s, 16 h) for 35 days. Read More

View Article and Full-Text PDF

Clock gene per 2 daily rhythm: Correlation with the serum level of uncoupling protein 1 (UCP1) in goat and horse.

J Therm Biol 2021 Apr 22;97:102891. Epub 2021 Feb 22.

Department of Veterinary Sciences, University of Messina, polo Universitario dell'Annunziata, 98168, Messina, Italy.

Recent studies evidenced that the circadian rhythm of Per2 is involved in adaptive thermogenesis by the modulating transcription of uncoupling protein 1 (UCP1). For this purpose, we investigated the linkage between the daily rhythm of Per2 and UCP1 in ruminant and non-ruminant mammalian species. Five clinically healthy, not pregnant, and not lactating Maltese female goats and five clinically healthy, not pregnant, and not lactating Italian Saddle horses were enrolled in the study. Read More

View Article and Full-Text PDF

Optimal combination of temperature and photoperiod for sex steroid hormone secretion and egg development of Oreochromis niloticus as determined by response surface methodology.

J Therm Biol 2021 Apr 21;97:102889. Epub 2021 Feb 21.

Fisheries of College of Guangdong Ocean University, Zhanjiang, 524025, Guangdong, China.

For successful reproduction of farmed fish, it is important to understand the relationship between gonadal development and environmental factors such as temperature and photoperiod. In this study, we determined the effects of temperature (T) and photoperiod (Pp) on serum estradiol-17β (E) and progesterone (P) contents, gonadosomatic index (GSI), and oocyte development in female tilapia. We used a central composite experimental design and response surface methodology. Read More

View Article and Full-Text PDF

Temperature-based phenology model to predict the development, survival, and reproduction of the oriental fruit fly Bactrocera dorsalis.

J Therm Biol 2021 Apr 25;97:102877. Epub 2021 Feb 25.

International Institute of Tropical Agriculture (IITA), BP 2008 (Messa), Yaoundé, Cameroon.

The oriental fruit fly Bactrocera dorsalis (Diptera: Tephritidae) is a major pest of fruit and vegetable production systems on several continents. The pest has invaded many countries, causing considerable impact on fruit production systems and commercialization. In this study we determined the relationship between temperature and development, survival and reproductive parameters of B. Read More

View Article and Full-Text PDF

Induction of diapause by clock proteins period and timeless via changes in PTTH and ecdysteroid titer in the sugar beet moth, Scrobipalpa ocellatella (Lepidoptera: Gelechiidae).

Arch Insect Biochem Physiol 2021 Apr 16:e21790. Epub 2021 Apr 16.

Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran.

The sugar beet moth, Scrobipalpa ocellatella (Boyd), one of the most severe sugar beet pests, causes quantitative and qualitative yield losses late in the autumn. Previously, it was shown that low temperature and short-day photoperiod together cause diapause induction in pupae. Here, the interaction of the critical elements of the diapause induction, including the period (PER), timeless (TIM), prothoracicotropic hormone (PTTH), and ecdysteroid titer, were investigated. Read More

View Article and Full-Text PDF

Temperature-Dependent Demography of Two Geographically Isolated Populations of Sesamia cretica (Lepidoptera: Noctuidae).

Environ Entomol 2021 Apr 16. Epub 2021 Apr 16.

Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran.

The pink stem borer, Sesamia cretica Lederer is considered as the main insect pest of maize and sugarcane worldwide. Reproductive and life table parameters of two populations of S. cretica were studied at 10 constant temperatures ranging from 12 to 36 (±1)°C, 50 ± 10% RH and a photoperiod of 0:24 (L:D) h for the larval stage and 16:8 (L:D) h for the other stages. Read More

View Article and Full-Text PDF

When vegetation indicates reproduction: the affinity between leaf morphology and flowering commitment in the lily meristem.

Physiol Plant 2021 Apr 15. Epub 2021 Apr 15.

Department of Life Sciences, Ben Gurion University of the Negev, Beer Sheva, Israel.

At the reproductive stage, lily plants bear two morphological types of mature leaves, one at the lower and one at the upper part of the stem. At the vegetative stage, all the leaves are similar to each other and to the reproductive plant's lower leaves. This heterophylly has not yet been explored. Read More

View Article and Full-Text PDF

First Report of Colletotrichum siamense causing Anthracnose on White Frangipani (Plumeria alba L.) in Malaysia.

Plant Dis 2021 Apr 15. Epub 2021 Apr 15.

Universiti Putra Malaysia, 37449, Department of Plant Protection, Faculty of Agriculture, Serdang, Selangor, Malaysia;

Plumeria alba L. is a flowering plant in the family Apocynaceae and widely cultivated in Malaysia as a cosmopolitan ornamental plant. In January 2020, anthracnose lesions were observed on leaves of Plumeria alba planted in Agricultural Farm, Universiti Putra Malaysia, in Selangor state, Malaysia. Read More

View Article and Full-Text PDF

First Report of Anthracnose on Pecan () Caused by in Korea.

Plant Dis 2021 Apr 15. Epub 2021 Apr 15.

National Institute of Forest Science, Division of Forest Diseases & Insect Pests, 57, Hoegi-ro, Dongdaemun-gu, Seoul, Korea (the Republic of), 02455;

In 2020, severely infected fruit of pecan, , showing distinct anthracnose symptoms were observed from pecan orchards in Uiseong (36°21'31.5"N 128°27'15.9"E) and Miryang (35°22'54. Read More

View Article and Full-Text PDF

First Report of Leaf Spot in Farfugium japonicum Caused by Alternaria alternata in China.

Plant Dis 2021 Apr 15. Epub 2021 Apr 15.

HUNAN AGRICULTURAL UNIVERSITY, PLANT DISEASE, ROOM S416, BUILDING 11, COLLEGE OF PLANT PROTECTION, HUNAN AGRICULTUTAL UNIVERSITY, 1 NONGDA ROAD, FURONG DISTRICT, CHANGSHA, HUNAN,CHINA, CHANGSHA, HUNAN, China, 410128;

Farfugium japonicum (L.) Kitam (with the common name leopard plant) is known as a garden and medical herb, and belongs to the family Asteraceae. In May 2019, a leaf spot disease was observed on the upper leaf surface of F. Read More

View Article and Full-Text PDF

Transcriptome architecture reveals genetic networks of bolting regulation in spinach.

BMC Plant Biol 2021 Apr 14;21(1):179. Epub 2021 Apr 14.

Department of Biotechnology, College of Agriculture, Isfahan University of Technology, Isfahan, Iran.

Background: Bolting refers to the early flowering stem production on agricultural and horticultural crops before harvesting. Indeed, bolting is an event induced by the coordinated effects of various environmental factors and endogenous genetic components, which cause a large reduction in the quality and productivity of vegetable crops like spinach. However, little is known about the signaling pathways and molecular functions involved in bolting mechanisms in spinach. Read More

View Article and Full-Text PDF

First Report of Lasiodiplodia theobromae Causing Postharvest Fruit Rot on Guava (Psidium guajava) in Malaysia.

Plant Dis 2021 Apr 14. Epub 2021 Apr 14.

Universiti Putra Malaysia, 37449, Department of Plant Protection, Faculty of Agriculture, Serdang, Selangor, Malaysia;

Guava (Psidium guajava L.) is an economically important tropical fruit crop and is cultivated extensively in Malaysia. In September and October 2019, postharvest fruit rot symptoms were observed on 30% to 40% of guava fruit cv. Read More

View Article and Full-Text PDF

First Report of AG-2-2 IIIB Causing Foliar Blight on in China.

Plant Dis 2021 Apr 14. Epub 2021 Apr 14.

Guangxi University for Nationalities, 47874, Guangxi Key Laboratory for Polysaccharide Materials and Modifications, Nanning 530006, P.R. China, Nanning, China, 530006;

(Thunb.) Rchb. f. Read More

View Article and Full-Text PDF

Comparisons in temperature and photoperiodic-dependent diapause induction between domestic and wild mulberry silkworms.

Sci Rep 2021 Apr 13;11(1):8052. Epub 2021 Apr 13.

Faculty of Textile Science and Technology, Shinshu University, Ueda, Nagano, 386-8567, Japan.

The bivoltine strain of the domestic silkworm, Bombyx mori, has two generations per year. It shows a facultative diapause phenotype determined by environmental conditions, including photoperiod and temperature, and nutrient conditions during embryonic and larval development of the mother. However, it remains unclear how the environmental signals received during development are selectively utilized as cues to determine alternative diapause phenotypes. Read More

View Article and Full-Text PDF

A parsimonious mechanistic model of reproductive and vegetative growth in fruit trees predicts consequences of fruit thinning and branch pruning.

Tree Physiol 2021 Apr 13. Epub 2021 Apr 13.

Politecnico di Milano, Dipartimento di Elettronica, Informazione e Bioingegneria, via Ponzio 34/5, 20133 Milano, Italy.

Productivity of fruit tree crops depends on the interaction between plant physiology, environmental conditions and agricultural practices. We develop a mechanistic model of fruit tree crops that reliable simulate the dynamics of variables of interest for growers and consequences of agricultural practices while relying on a minimal number of inputs and parameters. The temporal dynamics of carbon content in the different organs (i. Read More

View Article and Full-Text PDF

Juvenile hormone regulates photoperiod-mediated male reproductive diapause via the methoprene-tolerant gene in the ladybeetle Harmonia axyridis.

Insect Sci 2021 Apr 11. Epub 2021 Apr 11.

Hubei Key Laboratory of Insect Resources Utilization and Sustainable Pest Management, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.

Juvenile hormone (JH) absence induces photoperiod-mediated reproductive diapause, which is characterized by reproductive cessation. Although the role of methoprene-tolerant (Met)-mediated JH signaling in photoperiod-mediated female reproduction has been well documented, its role in male reproduction remains unclear. In this study, we investigated the role of JH in regulating photoperiod-mediated development of the male internal reproductive system (IRS) in the predatory ladybeetle Harmonia axyridis (Pallas). Read More

View Article and Full-Text PDF