番茄(Solanum lycopersicum L.)品种在干旱胁迫和旱后复水条件下的抗氧化防御系统

IF 2.3 4区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY
Naima N. Niyazova, Irada M. Huseynova
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引用次数: 0

摘要

摘要 缺水会引起植物叶片的生理、生化和分子变化,这些变化在植物适应性反应中起着至关重要的作用。研究了干旱和旱后复水对当地六个番茄(Solanum lycopersicum L.)品种的抗氧化酶活性和 H2O2、酚类化合物、抗坏血酸和脯氨酸水平的影响。所有受到干旱影响的番茄植株的 H2O2 和抗坏血酸含量都有所增加,但在重新浇水后又有所下降。酚类化合物的含量也随缺水而下降,然后在补水后恢复,但不同品种的反应程度不同。抗坏血酸过氧化物酶(APX)和愈创木酚过氧化物酶(POX)的活性以及脯氨酸的含量在干旱胁迫的植株中显著增加,然后在重新浇水后降低。在所有研究品种中,8 种组成型 APX 同工酶和 2 种组成型 POX 同工酶的活性在遭受干旱时各不相同,并在重新浇水后出现变化。有关番茄植株对干旱和随后重新浇水的反应的信息对于筛选和选择耐旱品种以及制定在不利环境条件下提高植株产量的策略具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

The Antioxidant Defense System of Tomato (Solanum lycopersicum L.) Varieties under Drought Stress and upon Post-Drought Rewatering

The Antioxidant Defense System of Tomato (Solanum lycopersicum L.) Varieties under Drought Stress and upon Post-Drought Rewatering

Water shortage induces physiological, biochemical, and molecular alterations in plant leaves that play an essential role in plant adaptive response. The effects of drought and post-drought rewatering on the activity of antioxidant enzymes and levels of H2O2, phenolic compounds, ascorbic acid, and proline were studied in six local tomato (Solanum lycopersicum L.) varieties. The contents of H2O2 and ascorbic acid increased in all drought-exposed tomato plants and then decreased upon rewatering. The level of phenolic compounds also decreased in response to water shortage and then recovered upon rehydration, although the extent of this response was different in different varieties. The activities of ascorbate peroxidase (APX) and guaiacol peroxidase (POX) and the content of proline significantly increased in the drought-stressed plants and then decreased when the plants were rewatered. The activities of 8 constitutive APX isoforms and 2 constitutive POX isoforms varied upon exposure to drought and were observed after rewatering in all studied varieties. The information on the response of tomato plants to drought and subsequent rewatering is of great importance for screening and selection of drought-tolerant varieties, as well as for development of strategies for increasing plant productivity under adverse environmental conditions.

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来源期刊
Biochemistry (Moscow)
Biochemistry (Moscow) 生物-生化与分子生物学
CiteScore
4.70
自引率
3.60%
发文量
139
审稿时长
2 months
期刊介绍: Biochemistry (Moscow) is the journal that includes research papers in all fields of biochemistry as well as biochemical aspects of molecular biology, bioorganic chemistry, microbiology, immunology, physiology, and biomedical sciences. Coverage also extends to new experimental methods in biochemistry, theoretical contributions of biochemical importance, reviews of contemporary biochemical topics, and mini-reviews (News in Biochemistry).
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