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Chitosan associated with chelated copper applied on tomatoes: enzymatic and anatomical changes related to plant defense responses
Scientia Horticulturae ( IF 4.3 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.scienta.2020.109431
Laís Gomes Adamuchio-Oliveira , Sérgio Miguel Mazaro , Gilda Mógor , Bruno Francisco Sant’Anna-Santos , Átila Francisco Mógor

Abstract The aim of this work was study the use of an experimental product containing chitosan and chelated cooper (Cu) as a sustainable tool for the protection of tomato plants, to understand which are the mechanisms involved in resistance promotion and what could be the anatomical changes on tomato leaves related to those defense responses. The experiment was conducted in a greenhouse with tomato plants grown in pots and subjected to weekly foliar sprays of a suspension containing chitosan associated with Cu-EDTA (ChiCu). The increase in the phenolic compound concentrations and phenylalanine ammonia-lyase (PAL) enzyme activities were detected 24 hours after. In addition, an increase was observed in the activity of chitinase and β-1,3-glucanase, enzymes related to defense responses. Also, an increase was found in the thickness of the outer periclinal wall on the adaxial epidermal surface in leaves submitted to 4 ml L-1 ChiCu. The proportion of the epiderm to the leaf blade was also higher. Although the pathogenicity-related enzymes were activated as well as phenolic compounds were increased, these changes did not affected the biometric and biochemical parameters related to the primary metabolism and essential for the maintenance of productive potential of tomato plants. The increase in the outer periclinal wall as a result of ChiCu sprays could have contributed to the resistance against diseases since it is the first barrier to the infection of a wide of pathogens.

中文翻译:

与螯合铜相关的壳聚糖应用于西红柿:与植物防御反应相关的酶促和解剖学变化

摘要 这项工作的目的是研究使用含有壳聚糖和螯合铜 (Cu) 的实验产品作为保护番茄植株的可持续工具,以了解哪些是抗性促进的机制以及可能发生的解剖变化。在与这些防御反应相关的番茄叶子上。该实验在温室中进行,番茄植株种植在盆中,每周对含有与 Cu-EDTA (ChiCu) 相关的壳聚糖的悬浮液进行叶面喷洒。24 小时后检测到酚类化合物浓度和苯丙氨酸解氨酶 (PAL) 酶活性的增加。此外,观察到与防御反应相关的几丁质酶和 β-1,3-葡聚糖酶的活性增加。还,在处理 4 ml L-1 ChiCu 的叶子中,发现正面表皮表面的外周壁厚度增加。表皮与叶片的比例也较高。尽管致病性相关酶被激活以及酚类化合物增加,但这些变化并未影响与初级代谢相关的生物特征和生化参数,并且对于维持番茄植株的生产潜力至关重要。由于 ChiCu 喷雾剂,外斜周壁的增加可能有助于抵抗疾病,因为它是感染多种病原体的第一道屏障。尽管致病性相关酶被激活以及酚类化合物增加,但这些变化并未影响与初级代谢相关的生物特征和生化参数,并且对于维持番茄植株的生产潜力至关重要。由于 ChiCu 喷雾剂,外斜周壁的增加可能有助于抵抗疾病,因为它是感染多种病原体的第一道屏障。尽管致病性相关酶被激活以及酚类化合物增加,但这些变化并未影响与初级代谢相关的生物特征和生化参数,并且对于维持番茄植株的生产潜力至关重要。由于 ChiCu 喷雾剂,外斜周壁的增加可能有助于抵抗疾病,因为它是感染多种病原体的第一道屏障。
更新日期:2020-09-01
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