Auxin-like compounds act as protectors against UV-B irradiation in garden pea plants

Botanica Lithuanica Pub Date : 2017-12-01 DOI:10.1515/botlit-2017-0010

I. Sergiev, D. Todorova, Elena Shopova, Z. Katerova, J. Jankauskienė, S. Jurkonienė

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引用次数: 5

Abstract

Abstract Pretreatment with the original auxin physiological analogues 1-[2-chloroethoxycarbonylmethyl]-4-naphthalenesulfonic acid calcium salt (TA-12) and 1-[2-dimethylaminoethoxicarbonylmethyl]naphthalene chlormethylate (TA-14) and subsequent UV-B irradiation (180 min at λmax 312 nm for 6.6 kJ·m−2) of pea plants (Pisum sativum L.) was investigated to assess if foliar application of these compounds has ability to attenuate the negative effects caused by UV-B stress. UV-B treatment increased malondialdehyde (MDA) and proline levels as well as superoxide dismutase, catalase and guaiacol peroxidase activities, but decreased hydrogen peroxide, low-molecular thiols, total phenolics and total soluble protein contents. The pre-treatment with TA compounds decreased the oxidative stress provoked by UV-B radiation detected by lower level of MDA, increased the content of thiols and UV-absorbing compounds and had favourable effect on H2O2 content and enzymatic activities. Exogenous application of auxin-like compounds on pea plantlets successfully counteracted UV-B induced oxidative stress via activation of ROS detoxifying enzymes and non-enzymatic antioxidants.

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植物生长素类化合物是豌豆抗UV-B辐射的保护剂

摘要采用生长素生理类似物1-[2-氯乙氧羰基甲基]-4-萘磺酸钙盐(TA-12)和1-[2-二甲氨基乙氧羰基甲基]萘氯甲基酸盐(TA-14)对豌豆进行预处理，然后进行UV-B照射(λmax 312 nm, 6.6 kJ·m - 2, 180 min)，以评估叶面施用这些化合物是否能够减轻UV-B胁迫引起的负面影响。UV-B处理提高了丙二醛(MDA)和脯氨酸水平以及超氧化物歧化酶、过氧化氢酶和愈创木酚过氧化物酶活性，降低了过氧化氢、低分子硫醇、总酚类物质和总可溶性蛋白含量。乙酸乙酯预处理降低了MDA水平较低的UV-B辐射引起的氧化应激，增加了硫醇和吸收紫外线的化合物的含量，对H2O2含量和酶活性有良好的影响。外源应用生长素类化合物通过激活活性氧解毒酶和非酶抗氧化剂成功地抵消了UV-B诱导的豌豆植株氧化应激。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Botanica Lithuanica

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