Allelopathic Impact of Callistemon Citrinus on Sorghum Bicolor Growth under Salinity Stress

Asian Journal of Research in Crop Science Pub Date : 2024-05-17 DOI:10.9734/ajrcs/2024/v9i2269

Hamed, Badr eldin Abd ElAal, Sayed, Mona

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Abstract

The current study assessed the impact of 0.09% aqueous leaf extract from Callistemon citrinus on the growth of two cultivars of Sorghum bicolor L. (Giza 15 - G15 and Dorado - Dor) under two salinity levels (100 mM and 200 mM NaCl). Results revealed that salinity reduced various growth criteria, including insoluble and total carbohydrates, photosynthetic pigments, protein, total phenols, and reduced glutathione, while soluble carbohydrates (sucrose and trehalose) were influenced. Salinity also affected free amino acids (proline and glycine betaine), malondialdehyde, and ascorbic acid. The activity of amylase decreased, while antioxidant enzymes (catalase, peroxidase, superoxide dismutase, ascorbic acid oxidase, and glutathione peroxidase) increased. Additionally, concentrations of K+, Ca++, and Mg++ were reduced, while Na+ accumulated. Application of Callistemon extract improved plant growth under stressed or normal growth conditions. The aqueous leaf extract (0.09%) of Callissstemon sp., with its enriched phenolic allelochemicals, mitigated the impact of salinity by enhancing photosynthesis, osmoregulation, and the antioxidant defense system of sorghum plants. Furthermore, results indicated that Sorghum cultivar G15 exhibited more resistance than Dor, with this resistance correlating with the activity of the antioxidant system.

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Callistemon Citrinus 在盐度胁迫下对双色高粱生长的异化作用

本研究评估了在两种盐度水平（100 mM 和 200 mM NaCl）下，0.09% 的柠檬茧叶水提取物对两种高粱品种（Giza 15 - G15 和 Dorado - Dor）生长的影响。结果表明，盐度降低了各种生长标准，包括不溶性碳水化合物和总碳水化合物、光合色素、蛋白质、总酚和还原型谷胱甘肽，而可溶性碳水化合物（蔗糖和三卤糖糖）则受到影响。盐度还影响游离氨基酸（脯氨酸和甘氨酸甜菜碱）、丙二醛和抗坏血酸。淀粉酶的活性下降，而抗氧化酶（过氧化氢酶、过氧化物酶、超氧化物歧化酶、抗坏血酸氧化酶和谷胱甘肽过氧化物酶）的活性上升。此外，K++、Ca++ 和 Mg++ 的浓度降低，而 Na+ 的浓度增加。在胁迫或正常生长条件下，施用 Callistemon 提取物都能改善植物的生长。Callissstemon sp.的叶片水提取物（0.09%）含有丰富的酚类等位化学物质，能增强高粱植物的光合作用、渗透调节和抗氧化防御系统，从而减轻盐碱的影响。此外，研究结果表明，高粱栽培品种 G15 比 Dor 表现出更强的抗性，这种抗性与抗氧化系统的活性有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Asian Journal of Research in Crop Science

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