Results 61 to 70 of about 13,690,399 (304)

Migration of Electronic Energy from Chlorophyll b to Chlorophyll a in Solutions

Biophysical Journal, 1972
Absorption, emission, and fluorescence excitation spectra of pure solutions of chlorophyll a (Chl a) and chlorophyll b (Chl b) in diethyl ether and of equimolecular mixed solutions of the two pigments, were determined at room temperature as functions of concentration (in the range from 5 x 10(-6) M to 4 x 10(-3) M) and of wavelength of the exciting ...
Bauer, R.K., Szalay, L., Tombacz, E.
openaire   +2 more sources

Auto‐Downregulation of the Florigen FT Production Prevents Precocious Flowering in Plants

Advanced Science, EarlyView.
This study shows that the leaf vein‐expressed FD complexes with the florigen FT to bind DNA motifs in FT promoter, which antagonizes CONSTANS‐mediated FT activation to feedback down‐regulate FT expression. This prevents an excessive induction of FT expression by inductive photoperiods, thereby precluding precocious transition to flowering in ...
Shu Tian, Xiao Luo, Bowen Cui, Yuehui He
wiley   +1 more source

Variability of Chlorophyll and Carotenoid Content in the Forest Grass Melica uniflora Retz.

Agronomy
Chlorophylls and carotenoids are key plant metabolites involved in photosynthesis, stress responses, and antioxidant activity. This study aimed to examine intrapopulation variability in Melica uniflora Retz.
Anna Paszkiewicz-Jasińska, Zuzanna Jakubowska, Wojciech Stopa, Waldemar Zielewicz, Barbara Wróbel   +4 more
doaj   +1 more source

Analysis of Photosynthetic Characteristics and UV-B Absorbing Compounds in Mung Bean Using UV-B and Red LED Radiation

Journal of Analytical Methods in Chemistry, 2014
Mung bean has been reported to have antioxidant, antidiabetic, anti-inflammatory, and antitumor activities. Various factors have important effects on the types and contents of plant chemical components.
Fang-Min Li, Zhi-Guo Lu, Ming Yue
doaj   +1 more source

Participation of Chlorophyll b Reductase in the Initial Step of the Degradation of Light-harvesting Chlorophyll a/b-Protein Complexes in Arabidopsis*

Journal of Biological Chemistry, 2009
The light-harvesting chlorophyll a/b-protein complex of photosystem II (LHCII) is the most abundant membrane protein in green plants, and its degradation is a crucial process for the acclimation to high light conditions and for the recovery of nitrogen ...
Y. Horie, Hisashi Ito, M. Kusaba, R. Tanaka, A. Tanaka   +4 more
semanticscholar   +1 more source

Dual Cytoplasmic and Chloroplastic Mechanisms Fine‐Tune Chloroplast Division through ARC3 Protein Stability

Advanced Science, EarlyView.
ARC3 levels are controlled by cytosolic and chloroplast proteolytic systems. PUB52 mediates ARC3 precursor ubiquitination and degradation in the cytosol, while CLPC1 promotes ARC3 degradation in chloroplasts, where ARC2 protects ARC3 from excessive breakdown. Disrupting these components causes chloroplast division defects, placing them upstream of ARC3.
Yang Yuan, Denghao Xiang, Ruiying Li, Zhichuang Yue, Zhipeng Wang, Honghong Hu   +5 more
wiley   +1 more source

Effects of foliar application of methanol on physiological characteristics of chickpea (Cicer arietinum L.) under drought stress [PDF]

پژوهش‌های حبوبات ایران, 2014
In order to evaluate the effects of foliar application of methanol on some physiological characteristics of chickpea under drought stress, an experiment was conducted as a factorial based on completely randomized design with three replications in 2011 at
Saeed Reza Hosseinzadeh, Monireh Cheniany, Azam Salimi   +2 more
doaj   +1 more source

Histone Modification Complex JMJ704‐HDA709 Negatively Regulates Salinity Tolerance in Rice

Advanced Science, EarlyView.
This study reveals that the rice histone demethylase JMJ704 interacts with HDA709―a H3K9ac deacetylase characterized herein―to form a chromatin‐modifying complex. Under salt stress, OsWRKY72 recruits this complex through interaction with JMJ704 to target loci, repressing the expression of oxidative stress and salt‐responsive genes via removal of ...
Jing Wang, Zhengting Chen, Pengxiang Bai, Biao Liu, Lingling Meng, Jian Zhang, Xu Li, Dao‐Xiu Zhou, Xuan Ma, Yu Zhao   +9 more
wiley   +1 more source

A Disaggregation Strategy for Nanopesticide Fabrication: Investigating the Impact of Nanosizing on Pesticide Biointeractions

Advanced Science, EarlyView.
To explore the impact of nanosizing on pesticide biointeractions, a 7‐nm (average) emamectin benzoate nanopesticide without nanocarriers or surfactants is fabricated via HOAc‐mediated disaggregation. Nanosizing enhances bioactivity against Megalurothrips usitatus and Meloidogyne enterolobii and improves plant penetration.
Jiaqi Wei, Jianxin Feng, Huiting Zhu, Kunzhong Lin, Chenhan Liu, Lin Li, Zhuoyan Xiao, Daihao Huang, Rong Liu, Huipeng Pan, Lingda Zeng, Hanhong Xu   +11 more
wiley   +1 more source

Efeitos de herbicidas nos teores de clorofilas de Spirodela punctata Effect of the herbicides on the chlorophyll content of Spirodela punctata

Planta Daninha, 1999
Com o objetivo de verificar na planta aquática Spirodela punctata o efeito de diferentes concentrações (0,005; 0,05; 0,5 e 5 mgL-1 de ingrediente ativo) dos herbicidas butachlor, glyphosate e propanil sobre os teores de clorofila a, b e na razão ...
Durvalina M. M. dos Santos, Robinson A. Pitelli, David A. Banzatto   +2 more
doaj   +1 more source