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寒冷适应缓解了光合作用抑制和氧化损伤,这种损害是由花苗的寒冷压力引起的

Chao Xu^1,2, Yuting Wang¹, Huidong Yang¹

¹Nanchang Key Laboratory of Germplasm Innovation and Utilization of Fruit and Tea, Jiangxi Academy of Agricultural Sciences, Nanchang, P. R. China.

Plant signaling & behavior

|November 28, 2023

概括

寒冷适应 (CA) 通过改善光合作用和抗氧化剂防御,增强花苗对寒冷压力的抵抗力. 这种策略可以减轻寒冷带来的伤害,促进植物的生存和生长.

科学领域:

植物生理学植物生理学
压力生物学压力生物学
农业科学农业科学

背景情况:

寒冷压力严重影响植物生长,分布和产量.
寒冷适应 (CA) 对于植物的抗寒能力至关重要,但其机制仍然不清楚.

研究的目的:

为了研究CA对类苗木抗寒性的影响.
阐明CA诱导的寒冷耐受性背后的生理和分子机制.

主要方法:

类苗木经过或没有先前的CA处理而受到冷应力.
评估了光合作用颜料,气体交换,酶活动 (Rubisco,FBPase),基因表达 (rbcL,rbcS),叶绿素光,氧化应激标志物 (H2O2,MDA),抗氧化酶活动 (SOD,CAT,APX,GR) 和激素水平 (ABA,SA).

主要成果:

在冷应力下,CA处理保持了光合作用色素含量和气体交换.
CA增强了Rubisco和FBPase活动,上调光合作用基因表达 (rbcL,rbcS).
CA提高了光系统II (PSII) 的光化学和电子转移效率.
通过减少H2O2和MDA,CA减轻了氧化损伤,促进了抗氧化酶活动和基因表达 (CuZnSOD1,CAT1,APX,GR).
在寒冷压力下,CA增加了酸 (ABA) 和酸 (SA) 水平.

结论:

CA有效地抑制了寒冷压力对树苗的负面影响.
通过提高光合作用性能,抗氧化能力和调节植物激素水平,CA增强了耐寒性.

关键词:

类植物中的类植物.寒冷适应习惯的过程.寒冷的压力是冷的压力.氧化应激是一种氧化应激.光合作用光合作用.

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