当前位置: X-MOL 学术Photosynth. Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The relationship between anthocyanin accumulation and photoprotection in young leaves of two dominant tree species in subtropical forests in different seasons.
Photosynthesis Research ( IF 3.7 ) Pub Date : 2020-09-09 , DOI: 10.1007/s11120-020-00781-4
Zheng-Chao Yu 1 , Wei Lin 1 , Xiao-Ting Zheng 1 , Wah Soon Chow 2 , Yan-Na Luo 1 , Min-Ling Cai 1 , Chang-Lian Peng 1
Affiliation  

Increasing amounts of experimental evidence show that anthocyanins provide physiological protection to plants under stress. However, the difference in photoprotection mediated by anthocyanins and other photoprotective substances in different seasons is still uncertain. To determine the relationship between anthocyanin accumulation and the photoprotective effects in different seasons, Castanopsis chinensis and Acmena acuminatissima, whose anthocyanin accumulation patterns differ in different seasons, were used as materials to explain how plants adapt to different seasons; as such, their physiological and biochemical responses were analyzed. Young leaves of C. chinensis and A. acuminatissima presented different colors in the different seasons. In summer, the young leaves of C. chinensis were purplish red, while those of A. acuminatissima were light green. In winter, the young leaves of C. chinensis were light green, while those of A. acuminatissima were red. Compared with the young red leaves, the young light green leaves that did not accumulate anthocyanins had higher flavonoid and phenolics contents, total antioxidant capacity, non-photochemical quenching (NPQ), and relative membrane leakage, and a slower recovery rate in the maximum photochemical efficiency (Fv/Fm) after high-light treatment. In addition, the net photosynthesis rate (Pn), transpiration rate (Tr), stomatal conductance (gs), and the effective quantum yield of PSII (ΦPSII) of the young leaves in winter were significantly lower than those in summer, while the activities of catalase (CAT, EC 1.11.1.6), peroxidase (POD, EC 1.11.1.7), and superoxide dismutase (SOD, EC 1.15.1.1) were significantly higher than those in summer. These data indicate that to adapt to seasonal changes anthocyanins, other antioxidative substances and antioxidative enzymes, as well as components involved in the safe dissipation of excitation energy as heat need to cooperate with one another.



中文翻译:

不同季节亚热带森林两种优势树种幼叶花青素积累与光保护的关系.

越来越多的实验证据表明,花青素可为受胁迫的植物提供生理保护。然而,花青素等光保护物质在不同季节介导的光保护作用的差异尚不确定。为确定不同季节花青素积累与光保护作用的关系,以不同季节花青素积累规律不同的Acmena acuminatissima为材料,解释植物如何适应不同季节;因此,对它们的生理和生化反应进行了分析。C. chinensisA. acuminatissima 的幼叶在不同的季节呈现不同的颜色。在夏季,年轻叶蜡梅为紫红色,而那些A.蒲桃呈翠绿色。在冬天,年轻叶蜡梅呈翠绿色,而那些A.蒲桃是红色。与红叶幼叶相比,未积累花青素的浅绿色幼叶黄酮类和酚类物质含量、总抗氧化能力、非光化学猝灭(NPQ)和相对膜渗漏均较高,最大光化学恢复速率较慢。高光处理后的效率(F v / F m)。此外,净光合作用速率 (P n )、蒸腾速率 ( T r )、气孔导度 ( g s ) 和幼叶PSII的有效量子产率 ( Φ PSII ) 显着低于夏季,而过氧化氢酶 (CAT , EC 1.11.1.6)、过氧化物酶 (POD, EC 1.11.1.7) 和超氧化物歧化酶 (SOD, EC 1.15.1.1) 均显着高于夏季。这些数据表明,为适应季节变化,花青素、其他抗氧化物质和抗氧化酶,以及参与作为热能安全消散的成分需要相互配合。

更新日期:2020-09-10
down
wechat
bug