Exploring the morpho-physiological responses of maize to nickel stress modulated by salicylic acid

IF 1.6 4区 农林科学 Q2 AGRONOMY Cereal Research Communications Pub Date : 2024-08-24 DOI:10.1007/s42976-024-00567-7
Atifa Masood, Sumaira Arooj, Muhammad Shahbaz, Noreen Khalid, Muhammad Sajjad, Muhammad Faisal Maqsood, Sunbal Khalil Chaudhari, Abida Abid, Rafia Zainab, Noor Fatima
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Abstract

Salicylic acid (SA) is an important phytohormone essential for the regulation of plant growth, development, ripening, and defense responses. The role of SA in plant–pathogen interactions has attracted a lot of attention. Aside from defense responses, SA is also important in responding abiotic stimuli. It has been proposed to have great potential for improving the stress resistance of major agricultural crops. On the other hand, SA utilization is dependent on the dosage of the applied SA, the technique of application, and the status of the plants (e.g., developmental stage and acclimation). Here, the effects of exogenously applied SA (0, 0.15 and 0.30 mM) as foliar spray under nickel (Ni) stress (0 and 700 µM) in root growing medium were studied on two maize varieties (C-20 and EV-79). The experiment was conducted using a three-factor factorial design with three replicates and watering 1L Hoagland’s nutrient solution/day. Ni stress decreased the number of leaves per plant, flag leaf area, total chlorophyll contents, carotenoids, K+, Ca2+ and P accumulation in stem, superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) activity, while enhanced the accumulation of total soluble proteins (TSP), total phenolics, ascorbic acid contents and Na+ ion accumulation in both varieties of maize. Exogenously applied SA increased the number of leaves per plant, flag leaf area, chlorophyll contents, K+, Ca2+ and P accumulation, SOD, POD and CAT activity, total phenolics and ascorbic acid contents and TSP. SA application reduced the Na+ ion accumulation in both maize varieties. A varietal difference was observed in all attributes, and variety C-20 was proved to be more resistant as compared to variety EV-79. Overall, the research aims to contribute to the understanding of how the exogenous application of salicylic acid influenced morpho-physiological responses of maize for enhancing the tolerance of maize to heavy metal stress.

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探索水杨酸调节玉米对镍胁迫的形态生理反应
水杨酸(SA)是一种重要的植物激素,对调节植物的生长、发育、成熟和防御反应至关重要。水杨酸在植物与病原体相互作用中的作用引起了广泛关注。除了防御反应,SA 在非生物刺激方面也有重要作用。人们认为它在提高主要农作物的抗逆性方面具有巨大潜力。另一方面,SA 的利用取决于施用 SA 的剂量、施用技术和植物的状态(如发育阶段和适应性)。在此,研究了外源施用 SA(0、0.15 和 0.30 毫摩尔)作为叶面喷施剂对两个玉米品种(C-20 和 EV-79)在根系生长介质中镍胁迫(0 和 700 微摩尔)下的影响。实验采用三因素因子设计,三次重复,每天浇灌 1 升 Hoagland 营养液。镍胁迫降低了两个玉米品种的单株叶片数、旗叶面积、叶绿素总含量、类胡萝卜素、茎秆中 K+、Ca2+ 和 P 的积累、超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)的活性,同时提高了总可溶性蛋白(TSP)、总酚、抗坏血酸含量和 Na+离子的积累。外源施用 SA 增加了单株叶片数、旗叶面积、叶绿素含量、K+、Ca2+ 和 P 的积累、SOD、POD 和 CAT 活性、总酚、抗坏血酸含量和 TSP。施用 SA 减少了两个玉米品种的 Na+离子积累。在所有属性方面都观察到了品种差异,与品种 EV-79 相比,品种 C-20 的抗性更强。总之,该研究旨在帮助人们了解外源施用水杨酸如何影响玉米的形态生理反应,以提高玉米对重金属胁迫的耐受性。
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来源期刊
CiteScore
3.40
自引率
6.20%
发文量
92
审稿时长
6-12 weeks
期刊介绍: This journal publishes original papers presenting new scientific results on breeding, genetics, physiology, pathology and production of primarily wheat, rye, barley, oats and maize.
期刊最新文献
Identification and stability of QTLs for grain traits in the elite wheat variety ‘Chuanmai104’ Chlorophyll fluorescence: a smart tool for maize improvement Effect of potassium supply and plant density on maize (Zea mays L.) yields and nutrient contents: a case study in a Hungarian long-term field trial set up on calcareous chernozem soil Targeting candidate genes for the macronutrient accumulation of wheat grains for improved human nutrition Survival of the Exserohilum rostratum causal leaf spot of wheat and dissemination, infection behaviour from flower-seed-seedlings
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