High temperature and high light intensity induced photoinhibition of bayberry (Myrica rubra Sieb. et Zucc.) by disruption of D1 turnover in photosystem II

2019 ◽  
Vol 248 ◽  
pp. 132-137 ◽  
Author(s):  
Yong-bin Gao ◽  
Wei-wei Zheng ◽  
Cong Zhang ◽  
Lan-lan Zhang ◽  
Kai Xu
Keyword(s):  
High Temperature ◽  
Photosystem Ii ◽  
Light Intensity ◽  
High Light Intensity ◽  
High Light ◽  
Myrica Rubra ◽  
D1 Turnover

Characteristics of Photosynthesis in Different Wheat Cultivars under High Light Intensity and High Temperature Stresses

2009 ◽  
Vol 34 (12) ◽  
pp. 2196-2201 ◽  
Author(s):  
Xue-Li QI ◽  
Lin HU ◽  
Hai-Bin DONG ◽  
Lei ZHANG ◽  
Gen-Song WANG ◽  
...  
Keyword(s):  
High Temperature ◽  
Light Intensity ◽  
High Light Intensity ◽  
High Light ◽  
Wheat Cultivars ◽  
Temperature Stresses

Environmental Influence on the Tolerance of Corn to Atrazine

Weed Science ◽  
1970 ◽  
Vol 18 (4) ◽  
pp. 509-514 ◽  
Author(s):  
Lafayette Thompson ◽  
F. W. Slife ◽  
H. S. Butler
Keyword(s):  
Zea Mays ◽  
High Temperature ◽  
Low Temperature ◽  
Light Intensity ◽  
Environmental Influence ◽  
High Light Intensity ◽  
High Light ◽  
Growth Chamber ◽  
Peptide Conjugates ◽  
Before And After

Corn(Zea maysL.) in the two to three-leaf stage grown 18 to 21 days in a growth chamber under cold, wet conditions was injured by postemergence application of 2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine (atrazine) plus emulsifiable phytobland oil. Injury was most severe when these plants were kept under cold, wet conditions for 48 hr after the herbicidal spray was applied, followed by exposure to high light intensity and high temperature. Under these growth chamber conditions, approximately 50% of the atrazine-treated plants died. Since wet foliage before and after application increased foliar penetration and low temperature decreased the rate of detoxication to peptide conjugates, atrazine accumulated under cold, wet conditions. This accumulation of foliarly-absorbed atrazine and the “weakened” conditions of the plants grown under the stress conditions is believed to be responsible for the injury to corn. Hydroxylation and the dihydroxybenzoxazin-3-one content in the roots were reduced at low temperature, but it is unlikely that this contributed to the death of the corn.

scholarly journals Photosystem II core quenching in desiccated Leptolyngbya ohadii

2019 ◽  
Vol 143 (1) ◽  
pp. 13-18 ◽  
Author(s):  
Reza Ranjbar Choubeh ◽  
Leeat Bar-Eyal ◽  
Yossi Paltiel ◽  
Nir Keren ◽  
Paul C. Struik ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Light Intensity ◽  
Photosynthetic Activity ◽  
High Light Intensity ◽  
Primary Electron ◽  
High Light ◽  
Harsh Environment ◽  
Primary Electron Donor ◽  
Protection Mechanism ◽  
The Core

Abstract Cyanobacteria living in the harsh environment of the desert have to protect themselves against high light intensity and prevent photodamage. These cyanobacteria are in a desiccated state during the largest part of the day when both temperature and light intensity are high. In the desiccated state, their photosynthetic activity is stopped, whereas upon rehydration the ability to perform photosynthesis is regained. Earlier reports indicate that light-induced excitations in Leptolyngbya ohadii are heavily quenched in the desiccated state, because of a loss of structural order of the light-harvesting phycobilisome structures (Bar Eyal et al. in Proc Natl Acad Sci 114:9481, 2017) and via the stably oxidized primary electron donor in photosystem I, namely P700+ (Bar Eyal et al. in Biochim Biophys Acta Bioenergy 1847:1267–1273, 2015). In this study, we use picosecond fluorescence experiments to demonstrate that a third protection mechanism exists, in which the core of photosystem II is quenched independently.

scholarly journals Autophagy-Related 2 Regulates Chlorophyll Degradation under Abiotic Stress Conditions in Arabidopsis

2020 ◽  
Vol 21 (12) ◽  
pp. 4515
Author(s):  
Zhuanzhuan Jiang ◽  
Li Zhu ◽  
Qiuyu Wang ◽  
Xin Hou
Keyword(s):  
Abiotic Stress ◽  
High Temperature ◽  
Light Intensity ◽  
Temperature Stress ◽  
High Throughput ◽  
High Temperature Stress ◽  
High Light Intensity ◽  
High Light ◽  
Stress Conditions ◽  
Chlorophyll Degradation

Chloroplasts are extraordinary organelles for photosynthesis and nutrient storage in plants. During leaf senescence or under stress conditions, damaged chloroplasts are degraded and provide nutrients for developing organs. Autophagy is a high-throughput degradation pathway for intracellular material turnover in eukaryotes. Along with chloroplast degradation, chlorophyll, an important component of the photosynthetic machine, is also degraded. However, the chlorophyll degradation pathways under high light intensity and high temperature stress are not well known. Here, we identified and characterized a novel Arabidopsis mutant, sl2 (seedling lethal 2), showing defective chloroplast development and accelerated chlorophyll degradation. Map-based cloning combined with high-throughput sequencing analysis revealed that a 118.6 kb deletion region was associated with the phenotype of the mutant. Complementary experiments confirmed that the loss of function of ATG2 was responsible for accelerating chlorophyll degradation in sl2 mutants. Furthermore, we analyzed chlorophyll degradation under abiotic stress conditions and found that both chloroplast vesiculation and autophagy take part in chlorophyll degradation under high light intensity and high temperature stress. These results enhanced our understanding of chlorophyll degradation under high light intensity and high temperature stress.

Sign in / Sign up

Export Citation Format

Share Document