Ekinci Melek, Shams Mostafakamal, Turan Metin, Ucar Sumeyra, Yaprak Esra, Yuksel Esra Arslan, Aydin Murat, Ilhan Emre, Agar Guleray, Ercisli Sezai, Yildirim Ertan
Department of Horticulture, Faculty of Agriculture, Atatürk University, Erzurum, Turkey.
Department of Plant Experimental Biology and Biotechnology, Faculty of Biology, University of Gdańsk, Wita Stwosza 59, 80-308, Gdańsk, Poland.
Heliyon. 2024 Aug 30;10(17):e36867. doi: 10.1016/j.heliyon.2024.e36867. eCollection 2024 Sep 15.
Chitosan (CTS) is one of the natural healers' alternatives to chemical products within the scope of good agricultural practices. It can be used in the improvement of agriculture (prevention of toxic metal uptake by plants) due to its chelating feature of metal ions. This study aims to investigate the effectiveness of chitosan in eliminating the negative effects of cadmium (Cd) stress on pepper ( L.). The results showed that Cd stress significantly decreased plant growth, chlorophyll content, and leaf water relative content, followed by an increase in proline, antioxidant enzyme activities, and abscisic acid (ABA) content. According to the results, Cd treatment (200 mg kg-1) significantly increased the aspartate, glutamate, asparagine, histidine, and phenylalanine content, while it significantly decreased the content of endogenous hormones such as gibberellic acid (GA), indole-3-acetic acid (IAA), and salicylic acid (SA). However, CTS application decreased the uptake of Cd and caused a decrease in hydrogen peroxide (HO), abscisic acid (ABA), and melondialdehyde (MDA) content, as well as an increase in plant performance, and GA, IAA, and SA content in the plants grown under Cd pollution compared to the ones treated with Cd and without CTS. This study suggests that CTS application helps pepper seedlings tolerate Cd stress through a decrease in Cd uptake, and an increase in amino acids and hormone content.
壳聚糖（CTS）是良好农业规范范围内天然替代化学产品的治疗剂之一。由于其对金属离子的螯合特性，它可用于改善农业（防止植物吸收有毒金属）。本研究旨在探究壳聚糖消除镉（Cd）胁迫对辣椒（L.）负面影响的有效性。结果表明，镉胁迫显著降低了植物生长、叶绿素含量和叶片相对含水量，随后脯氨酸、抗氧化酶活性和脱落酸（ABA）含量增加。根据结果，镉处理（200毫克/千克）显著增加了天冬氨酸、谷氨酸、天冬酰胺、组氨酸和苯丙氨酸的含量，同时显著降低了赤霉素（GA）、吲哚 - 3 - 乙酸（IAA）和水杨酸（SA）等内源激素的含量。然而，与仅用镉处理且未施用壳聚糖的植株相比，施用壳聚糖减少了镉的吸收，并导致镉污染条件下生长的植株中过氧化氢（HO）、脱落酸（ABA）和丙二醛（MDA）含量降低，以及植株性能、GA、IAA和SA含量增加。本研究表明，施用壳聚糖通过减少镉吸收以及增加氨基酸和激素含量，帮助辣椒幼苗耐受镉胁迫。
