卡诺拉,一种重要的油料作物,在全球范围内种植食品和生物柴油。随着种植各种作物的巨大需求,农业边缘土地的利用正在成为一种有吸引力的替代方案,包括微咸盐过渡土地。盐度是限制大多数作物生长和生产力的主要非生物胁迫。造成粮食不安全。水杨酸(SA),一种小分子酚类化合物,是一种必需的植物防御植物激素,可促进对病原体的免疫力。最近,一些研究报道,SA能够提高植物抵御高盐度的能力。为此,进行了盆栽实验,以通过叶面施用SA来改善氯化钠(NaCl)对油菜植物的负面影响。评估了两种油菜品种Faisal(V1)和Super(V2)在暴露于高盐度,即OmMNaCl(对照)和200mMNaCl期间的生长性能。通过叶面喷雾施用三种水平的SA(0、10和20mM)。用于该研究的实验设计是具有三个重复的完全随机设计(CRD)。盐胁迫使枝条和根鲜重分别降低了50.3%和47%。此外,叶片叶绿素a和b含量下降至61-65%。同时,SA处理减少了盐度的负面影响,并增加了芽鲜重(49.5%),根干重(70%),chl.a(36%)和chl。b(67%)。用SA处理的植物显示两种酶的水平增加,即(超氧化物歧化酶(27%),过氧化物酶(16%)和过氧化氢酶(34%)和非酶抗氧化剂,即总可溶性蛋白质(20%),总可溶性糖(17%),总酚(22%)类黄酮(19%),花青素(23%),和内源性抗坏血酸(23%)。SA的施用还增加了渗透物的水平,即甘氨酸甜菜碱(31%)和总游离脯氨酸(24%)。盐度增加了油菜植物中Na离子的浓度,并同时降低了K和Ca2的吸收。总的来说,SA的叶面处理在减少盐度的负面影响方面非常有效。通过比较两种油菜品种,观察到品种V2(Super)比品种V1(Faisal)生长更好。有趣的是,20mM叶面施用SA被证明可有效改善油菜植物高盐度的负面影响。
Canola, a vital oilseed crop, is grown globally for food and biodiesel. With the enormous demand for growing various crops, the utilization of agriculturally marginal lands is emerging as an attractive alternative, including brackish-saline transitional lands. Salinity is a major abiotic stress limiting growth and productivity of most crops, and causing food insecurity. Salicylic acid (SA), a small-molecule phenolic compound, is an essential plant defense phytohormone that promotes immunity against pathogens. Recently, several studies have reported that SA was able to improve plant resilience to withstand high salinity. For this purpose, a pot experiment was carried out to ameliorate the negative effects of sodium chloride (NaCl) on
canola plants through foliar application of SA. Two
canola varieties Faisal (V1) and Super (V2) were assessed for their growth performance during exposure to high salinity i.e. 0 mM NaCl (control) and 200 mM NaCl. Three levels of SA (0, 10, and 20 mM) were applied through foliar spray. The experimental design used for this study was completely randomized design (CRD) with three replicates. The salt stress reduced the shoot and root fresh weights up to 50.3% and 47% respectively. In addition, foliar chlorophyll a and b contents decreased up to 61-65%. Meanwhile, SA treatment diminished the negative effects of salinity and enhanced the shoot fresh weight (49.5%), root dry weight (70%), chl. a (36%) and chl. b (67%). Plants treated with SA showed an increased levels of both enzymatic i.e. (superoxide dismutase (27%), peroxidase (16%) and catalase (34%)) and non-enzymatic antioxidants i.e. total soluble protein (20%), total soluble sugar (17%), total phenolic (22%) flavonoids (19%), anthocyanin (23%), and endogenous ascorbic acid (23%). Application of SA also increased the levels of osmolytes i.e. glycine betaine (31%) and total free proline (24%). Salinity increased the concentration of Na+ ions and concomitantly decreased the K+ and Ca2+ absorption in canola plants. Overall, the foliar treatments of SA were quite effective in reducing the negative effects of salinity. By comparing both varieties of
canola, it was observed that variety V2 (Super) grew better than variety V1 (Faisal). Interestingly, 20 mM foliar application of SA proved to be effective in ameliorating the negative effects of high salinity in
canola plants.