将节节孢螺旋藻(Spirulina platensis)用作小麦(Triticum aestivum L.)抗旱生物刺激剂以实现可持续农业的潜力

IF 3.9 3区 生物学 Q1 PLANT SCIENCES
Rasha M. El-Shazoly, Abeer S. Aloufi, Mustafa A. Fawzy
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引用次数: 0

摘要

有几种蓝藻已被用作不同胁迫下的有效天然生物刺激剂,但尚未对蓝藻的利用进行广泛研究。本研究评估了在正常胁迫和两种干旱胁迫(80% 和 60% 的田间持水量)条件下,两次添加活体蓝藻(按干重计算为 25 毫克/升)对小麦生长、光合色素和抗氧化防御能力的影响。在干旱胁迫条件下,小麦的生长参数(芽高、鲜重和干重、光合色素)和抗氧化防御能力受到显著抑制,测量值低于对照。用 S. platensis 处理小麦植株成功地改善了所有生长指标。在 80% 和 60% FWC 条件下,芽的鲜重和干重增加了约 25%,芽的高度增加了约 33%。在 60% FWC 条件下,T. aestivum 的光合色素(chl. a、b 和类胡萝卜素)含量分别显著提高了 38%、31% 和 34%。在富含螺旋藻的土壤中,清除不同自由基(OH¯⋅、H2O2、NO 和金属螯合)和抑制脂质过氧化的抗氧化能力百分比,以及酶(CAT 和 APX)、非酶抗氧化剂(酚类、还原力、总抗氧化剂)的抗氧化能力百分比都有明显提高。在 60% FWC 条件下,小麦幼苗嫩枝中抗氧化酶(SOD、CAT、POD 和 APX)的活性分别显著提高了 150%、83%、193% 和 11%。在螺旋藻处理过的土壤中,小麦的可溶性代谢物成分(碳水化合物、游离氨基酸和可溶性蛋白质)明显增加。用螺旋藻处理过的小麦幼苗根部的可溶性蛋白质、游离氨基酸和可溶性碳水化合物的增幅最大(分别为 21.67、4.68 和 41.67 mg g-1 FW)。基于螺旋藻的生物刺激剂能显著提高光合色素的含量,因此其应用符合可持续农业的理念,同时也证实了 T. aestivum 的生长与所测量的抗氧化剂参数之间的相关性。PCA 双平面图表明,叶绿素色素、可溶性代谢物(蛋白质、氨基酸和碳水化合物)、酚类、还原力和黄酮类化合物与所有生长指标和抗氧化能力之间存在很大的矛盾。因此,本研究的结果支持使用板蓝根螺旋藻处理小麦,其主要功效是在干旱条件下通过减少干旱胁迫的不利影响来改善小麦植株的生长。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

The Potential Use of Arthrospira (Spirulina platensis) as a Biostimulant for Drought Tolerance in Wheat (Triticum aestivum L.) for Sustainable Agriculture

The Potential Use of Arthrospira (Spirulina platensis) as a Biostimulant for Drought Tolerance in Wheat (Triticum aestivum L.) for Sustainable Agriculture

Several cyanobacteria have been used as effective natural biostimulants under different stresses, but the utilization of Spirulina platensis has not been extensively investigated. The effects of living S. platensis (25 mg/L on dry weight basis) added twice as soil addition on growth, photosynthetic pigmentation, and antioxidant defenses of Triticum aestivum plants grown under normal and two drought stresses (80 and 60% Field capacity) were evaluated. Under drought stress conditions, growth parameters (shoot height, fresh, and dry weights, photosynthetic pigments) and antioxidant defenses were significantly inhibited by recording relatively lower values of the measured characters than the control. The treatment of wheat plants with S. platensis was successful in improving all growth metrics. Under 80 and 60% FWC, the fresh and dry weight of the shoot increased by approximately 25%, while the height of the shoot improved by approximately 33%. The contents of photosynthetic pigment (chl. a, b, and carotenoids) of T. aestivum were significantly induced by 38%, 31%, and 34%, respectively, under 60% FWC. Antioxidant capacity percentages as scavengers of different free radicals (OH¯⋅, H2O2, NO, and metal chelating), and inhibition of lipid peroxidation, in addition to enzymes (CAT and APX), non-enzymatic antioxidants (phenolics, reducing power, total antioxidants) were significantly improved in Spirulina-enriched soil. The activity of antioxidant enzymes (SOD, CAT, POD, and APX) increased significantly in the shoot of wheat seedling by 150%, 83%, 193% and 11%, respectively, under 60% FWC. Components of soluble metabolites (carbohydrates, free amino acids, and soluble proteins) of T. aestivum were significantly enhanced in Spirulina-treated soil. The roots of wheat seedlings treated with S. platensis showed the highest increase in soluble proteins, free amino acids, and soluble carbohydrates (21.67, 4.68, and 41.67 mg g−1 FW, respectively). The application of Spirulina-based biostimulators is aligned with the sustainable agriculture concept by significant improving the content of photosynthetic pigments, confirming the correlation between growth and the measured antioxidants parameters of T. aestivum. The PCA biplot indicated a great contradiction between chlorophyll pigments, soluble metabolites (proteins, amino acids, and carbohydrates), phenolics, reducing power and flavonoids, and all growth indicators and antioxidant abilities. Therefore, the results of this study support the use of the Spirulina platensis treatment, which was mainly effective in improving the growth of wheat plants by reducing the detrimental effects of drought stress in dry conditions.

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来源期刊
CiteScore
8.40
自引率
6.20%
发文量
312
审稿时长
1.8 months
期刊介绍: The Journal of Plant Growth Regulation is an international publication featuring original articles on all aspects of plant growth and development. We welcome manuscripts reporting question-based research on various aspects of plant growth and development using hormonal, physiological, environmental, genetic, biophysical, developmental and/or molecular approaches. The journal also publishes timely reviews on highly relevant areas and/or studies in plant growth and development, including interdisciplinary work with an emphasis on plant growth, plant hormones and plant pathology or abiotic stress. In addition, the journal features occasional thematic issues with special guest editors, as well as brief communications describing novel techniques and meeting reports. The journal is unlikely to accept manuscripts that are purely descriptive in nature or reports work with simple tissue culture without attempting to investigate the underlying mechanisms of plant growth regulation, those that focus exclusively on microbial communities, or deal with the (elicitation by plant hormones of) synthesis of secondary metabolites.
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