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首页> 外文期刊>Acta Physiologiae Plantarum >Seasonal changes in anthocyanin contents and in activities of xanthophyll and ascorbate-glutathione cycles in Sabina species derived from different environments
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Seasonal changes in anthocyanin contents and in activities of xanthophyll and ascorbate-glutathione cycles in Sabina species derived from different environments

机译：来自不同环境的沙宾种花色苷含量以及叶黄素和抗坏血酸-谷胱甘肽循环的季节性变化

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摘要

Qilian Juniper (Sabina przewalskii Kom.) and Chinese juniper [Sabina chinensis (Lin.) Ant.] are overwintering plants. S. przewalskii, a protected species in China, is distributed in subalpine and alpine area on the Qinghai-Tibet Plateau. S. chinensis is distributed in plain area. We investigated seasonal changes in photoprotective stress compounds such as anthocyanins, activities of three enzymes of ascorbate-glutathione pathway, as well as xanthophyll size and conversion in these species. Ascorbate peroxidase (APX), dehydroascorbate reductase (DHAR) and glutathione reductase (GR) levels were higher in the low-temperature months, which was associated with changes in anthocyanins and in de-epoxidation index [(A + Z)/(V + A + Z)]. Photochemical efficiency of PSII (Fv/Fm) was lower (< 0.70) during winter and late autumn in both species. During the low-temperature months, S. przewalskii had higher levels of photoprotective stress compounds than S. chinensis. The results suggested that these two species possess cold-induced photoinhibition functions and show the inherent, season-dependent differences in the amounts of the stress-related compounds.
机译：祁连杜鹃（Sabina przewalskii Kom。）和杜松[Sabina chinensis（Lin。）Ant。]是越冬植物。 S. przewalskii是中国的一种受保护物种，分布在青藏高原的亚高山和高山地区。中华。分布在平原地区。我们调查了光保护性胁迫化合物（如花青素），抗坏血酸-谷胱甘肽途径的三种酶的活性以及这些物种中的叶黄素大小和转化率的季节性变化。低温月份抗坏血酸过氧化物酶（APX），脱氢抗坏血酸还原酶（DHAR）和谷胱甘肽还原酶（GR）的水平较高，这与花色苷的变化和脱环氧化指数[（A + Z）/（V + A + Z）]。在两个物种的冬季和深秋，PSII的光化学效率（Fv / Fm）均较低（<0.70）。在低温月份，S。przewalskii的光保护应激化合物水平高于S. chinensis。结果表明，这两个物种具有冷诱导的光抑制功能，并且在与胁迫相关的化合物的量方面表现出固有的，与季节相关的差异。

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