Exogenous arginine enhances the chilling tolerance in postharvest papaya fruit by regulating arginine and proline metabolism

2021 ◽  
Author(s):  
Qun Huang ◽  
Hanliang Song ◽  
Yonggui Pan ◽  
Zhengke Zhang
Keyword(s):  
Chilling Tolerance ◽  
Proline Metabolism

scholarly journals Melatonin Enhances Cold Tolerance by Regulating Energy and Proline Metabolism in Litchi Fruit

Foods ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 454 ◽  
Author(s):  
Gangshuai Liu ◽  
Yuxin Zhang ◽  
Ze Yun ◽  
Meijiao Hu ◽  
Jialiang Liu ◽  
...  
Keyword(s):  
Higher Plants ◽  
Chilling Injury ◽  
Energy Charge ◽  
Membrane Integrity ◽  
Chilling Tolerance ◽  
Proline Metabolism ◽  
Ambient Temperatures ◽  
Physiological Processes ◽  
Litchi Fruit ◽  
Relative Electrical Conductivity

Melatonin (MLT) is a vital signaling molecule that regulates multiple physiological processes in higher plants. In the current study, the role of MLT in regulating chilling tolerance and its possible mechanisms in litchi fruit during storage at ambient temperatures after its removal from refrigeration was investigated. The results show that the application of MLT (400 μM, dipping for 20 min) to ‘Baitangying’ litchi fruit effectively delayed the development of chilling injury (CI) while inhibiting pericarp discoloration, as indicated by higher chromacity values (L*, a*, b*) and anthocyanin levels. MLT treatment suppressed the enhancements of the relative electrical conductivity (REC) and malondialdehyde (MDA) content, which might contribute to the maintenance of membrane integrity in litchi fruit. MLT treatment slowed the decline in cellular energy level, as evidenced by higher adenosine triphosphate (ATP) content and a higher energy charge (EC), which might be ascribed to the increased activities of enzymes associated with energy metabolism including H+-ATPase, Ca2+-ATPase, succinate dehydrogenase (SDH), and cytochrome C oxidase (CCO). In addition, MLT treatment resulted in enhanced proline accumulation, which was likely a consequence of the increased activities of ornithine-δ-aminotransferase (OAT) and Δ1-pyrroline-5-carboxylate synthase (P5CS) and the suppressed activity of proline dehydrogenase (PDH). These results suggest that the enhanced chilling tolerance of litchi fruit after MLT treatment might involve the regulation of energy and proline metabolism.

Reprogramming of mitochondrial proline metabolism promotes liver tumorigenesis

Amino Acids ◽  
2021 ◽  
Author(s):  
Zhaobing Ding ◽  
Russell E. Ericksen ◽  
Qian Yi Lee ◽  
Weiping Han
Keyword(s):  
Proline Metabolism

Short‐term hypobaric treatment enhances chilling tolerance in peaches

2021 ◽  
Author(s):  
Xuedan zhang ◽  
Li Xin ◽  
Chao Wang ◽  
Shan Sun ◽  
Yanhui Lyu
Keyword(s):  
Chilling Tolerance ◽  
Short Term

scholarly journals Ethylene Supplementation Combined with Split Application of Nitrogen and Sulfur Protects Salt-Inhibited Photosynthesis through Optimization of Proline Metabolism and Antioxidant System in Mustard (Brassica juncea L.)

Plants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1303
Author(s):  
Badar Jahan ◽  
Noushina Iqbal ◽  
Mehar Fatma ◽  
Zebus Sehar ◽  
Asim Masood ◽  
...  
Keyword(s):  
Salt Stress ◽  
Brassica Juncea ◽  
Antioxidant System ◽  
Photosynthetic Efficiency ◽  
Growth Potential ◽  
Proline Metabolism ◽  
Sowing Time ◽  
Stress Effects ◽  
Nutrient Assimilation ◽  
S Application

In the present study, the potential of ethylene as ethephon (an ethylene source) was investigated individually and in combination with split doses of nitrogen (N) and sulfur (S) soil treatments for removal of the damaging effects of salt stress (100 mM NaCl) in mustard (Brassica juncea L.). Plants were grown with 50 mg N plus 50 mg S kg−1 soil at sowing time and an equivalent dose at 20 days after sowing [N50 + S50]0d and 20d. Ethephon at 200 μL L‒1 was applied to combined split doses of N and S with or without NaCl. Plants subjected to NaCl showed a decrease in growth and photosynthetic characteristics as well as N and S assimilation, whereas proline metabolism and antioxidants increased. The application of ethephon to plants grown with split N and S doses significantly enhanced photosynthetic efficiency by increasing the assimilation of N and S, improving the concentration of proline and induction of the antioxidant system with or without NaCl. The regulation of ethylene and/or split forms of N and S application may be potential tools for not just overcoming salt stress effects in this species and in related Brassicaceae but also enhancing their photosynthesis and growth potential through increased nutrient assimilation.

OsGRF6 interacts with SLR1 to regulate OsGA2ox1 expression for coordinating chilling tolerance and growth in rice

2021 ◽  
Vol 260 ◽  
pp. 153406
Author(s):  
Zhitao Li ◽  
Bo Wang ◽  
Zeyong Zhang ◽  
Wei Luo ◽  
Yongyan Tang ◽  
...  
Keyword(s):  
Chilling Tolerance

scholarly journals Proline metabolism and transport in retinal health and disease

Amino Acids ◽  
2021 ◽  
Author(s):  
Jianhai Du ◽  
Siyan Zhu ◽  
Rayne R. Lim ◽  
Jennifer R. Chao
Keyword(s):  
Proline Metabolism ◽  
Health And Disease
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