Evaluation of physiological and morphological responses of Salix alba and Salix babylonica to witches’ broom gall

IF 1.7 3区农林科学 Q2 AGRONOMY

European Journal of Plant Pathology Pub Date : 2024-03-27 DOI:10.1007/s10658-024-02833-0

Behrooz Salehi-Eskandari, Shahla Kazemi Renani, Shokoofeh Hajihashemi

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Abstract

The gall formation in Salix species is caused by Candidatus phytoplasma trifolii. The present study was designed with the aim of evaluation of the morphological and physiological response of two species of Salix alba and Salix babylonica to gallers in the witches^’ broom structure. The morphological responses of Salix species to gallers, denoted as biotic stress, were represented by growth suppression of leaves and shoots. Accordingly, the leaf area and shoot internodes significantly decreased, in comparison with healthy plants. The biotic stress can induce oxidative stress, which was observed in the present study with a high accumulation of H₂O₂ in galled tissues. High accumulation of H₂O₂ in the infected tissue damaged chlorophyll a and proteins. Even though Salix species induced the antioxidants catalase, peroxidase, proline, anthocyanins and phenols to scavenge reactive oxygen species (ROS), high accumulation of H₂O₂ was observed in galled tissues. Altogether, regardless of activation of antioxidants in response to galls-induced oxidative stress, ROS accumulation damaged photosynthetic apparatus and proteins.

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评估白沙柳和巴比伦沙柳对女巫扫帚瘿的生理和形态反应

沙柳树种的虫瘿形成是由三叶瘿蚊原体（Candidatus phytoplasma trifolii）引起的。本研究旨在评估白沙柳和沙柳两种植物对巫婆帚结构中虫瘿的形态和生理反应。沙柳品种对五倍子的形态反应（即生物胁迫）表现为叶片和嫩枝的生长抑制。因此，与健康植物相比，叶面积和嫩枝节间明显减少。生物胁迫可诱导氧化胁迫，本研究中观察到，有瘿组织中的 H2O2 积累较高。感染组织中 H2O2 的大量积累会破坏叶绿素 a 和蛋白质。尽管沙柳能诱导抗氧化剂过氧化氢酶、过氧化物酶、脯氨酸、花青素和酚类清除活性氧（ROS），但在被咬伤的组织中仍观察到 H2O2 的大量积累。总之，无论抗氧化剂是否对虫瘿引起的氧化应激做出反应，ROS 的积累都会损害光合装置和蛋白质。

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来源期刊

European Journal of Plant Pathology 农林科学-农艺学

CiteScore

4.20

自引率

5.60%

发文量

183

审稿时长

3 months

期刊介绍： The European Journal of Plant Pathology is an international journal publishing original articles in English dealing with fundamental and applied aspects of plant pathology; considering disease in agricultural and horticultural crops, forestry, and in natural plant populations. The types of articles published are :Original Research at the molecular, physiological, whole-plant and population levels; Mini-reviews on topics which are timely and of global rather than national or regional significance; Short Communications for important research findings that can be presented in an abbreviated format; and Letters-to-the-Editor, where these raise issues related to articles previously published in the journal. Submissions relating to disease vector biology and integrated crop protection are welcome. However, routine screenings of plant protection products, varietal trials for disease resistance, and biological control agents are not published in the journal unless framed in the context of strategic approaches to disease management.