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在三种玄米品种中对补充UV-B辐射和阳光的不同抗氧化剂反应

Sonja Milić Komić¹, Bojana Živanović¹, Jelena Dumanović²

¹Institute for Multidisciplinary Research, Department of Life Science, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia.

International journal of molecular sciences

|October 28, 2023

概括

玄米植物通过增加抗氧化剂和特定化合物来适应强光和UV-B. 然而,UV-B可以造成损害,响应因方品种而异,表明基因型特异性耐受性.

科学领域:

植物生理学植物生理学
摄影生物学摄影生物学
生物化学生物化学

背景情况:

玄米植物 (Ocimum basilicum) 在全球范围内用于和药用.
了解植物对强光和UV-B等环境压力因素的反应,对于作物改善至关重要.
玄米品种表现出不同的形态和生化特征.

研究的目的:

调查三种玄米品种对不同光线条件的适应反应,包括高太阳辐射和额外的UV-B.
为了确定光应激对抗氧化剂状况,型和大植物生长的影响.
揭示品种特异性和光特异性耐受性机制.

主要方法:

有三种玄米品种 (Ocimum basilicum var. 热诺维兹,O. 在 × citriodorum,O. basilicum var. 这种植物有很多种. 紫色) 接受了四种光照:中度光照,开放场地和带有或没有UV-B的生长室.
分析了叶子样本的总抗氧化能力 (TAC),化合物 (基胺酸,黄酸),酸盐含量和III类过氧化酶 (POD) 活性.
评估了形态变化,表皮紫外线吸收物质和生长抑制.

主要成果:

在所有品种中,高太阳辐射增加了 TAC,基酸 (HCAs),黄酸和吸收紫外线的物质,以及叶子干/新鲜重量比.
补充UV-B增加了TAC和POD活性,HCA (罗斯马林酸) 优先积累于黄酸,但降低了酸盐和表皮黄酸.
紫外线B引起的叶子曲,生长抑制,H2O2积累和叶子色,严重程度取决于香品种.

结论:

玄米品种对强光和UV-B压力表现出明显的生理和生化反应.
紫外线 (UV-B) 辐射可以诱导白叶的保护机制和氧化破坏.
基因型特异性耐受性机制隐含在白对高剂量UV-B的反应中.

关键词:

这是Ocimum basilicum var. 的一个. 热诺维斯人热诺维斯人这是Ocimum basilicum var. 的一个. 紫色的紫色的香水奥西姆 (Ocimum) × 色 (citriodorum) 是一个亚甲酸盐是一种亚酸盐.皮肤上的黄类药物.过氧化是一种过氧化.聚醇是一种多醇.补充和生态相关的UV-B辐射照射.叶子的总抗氧化能力.

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