Cowpea seeds from plants subjected to restricted-and full-irrigation regimes show differential phytochemical activity.

IF 3.4 3区 生物学 Q1 Agricultural and Biological Sciences
MirReza Miri, Farshad Ghooshchi, Hamid Reza Tohidi Moghadam, HamidReza Larijani, Pourang Kasraie
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引用次数: 0

Abstract

Background: Water scarcity is responsible for losses in the yield of many plants and this is expected to continue due to climate change. However, cowpea which is known for its drought tolerance, is considered as a plant without limitations to climate change. A two-year experiment was conducted to evaluate the effect of water restriction on phenolic compounds, antioxidant capacity and leaf nutrients concentration of four cultivars of cowpea at different growth stages. At second leaf stage, two irrigation regimes were initiated (Water irrigation was applied after 75% and 55% of field capacity, as well watered and drought stress treatment, respectively).Plants samples were collectedat three stages(immature pod, immature seed and dry seed stage) for total phenol and flavonoids content, ortho-diphenols andantioxidant capacity measurement and leaves sampling for nutrients concentration.

Results: The results indicated that polyphenolic compounds and antioxidant capacity increased under drought conditions. However, in both irrigation regimes, immature pods had the higher polyphenolic compounds, antioxidant capacity and leaf nutrients concentration rather than immature seeds and dry seeds. Among the genotypes, ILC482 revealed the highest content of total phenolics and ortho-diphenols (6.9 and 3.57 mg GA g-1dry weight, respectively). In addition, nitrogen, phosphorus and magnesium concentration of leaves were higher in ILC482 genotype. Under drought stress, ILC482 maintained higher ABTS radical scavenging capacity (0.0083 mmol Trolox g-1dry weight) compared to other genotypes.

Conclusions: It is suggested that drought stress affect the quality of cowpea productions through polyphenolic compounds, ABTS and DPPH radical scavenging capacity which can be used as a helpful strategy to save water in the regions where water is scare.

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受限制灌溉和完全灌溉的豇豆种子表现出不同的植物化学活性。
背景:水资源短缺是造成许多植物产量损失的原因,由于气候变化,这种情况预计将继续下去。然而,豇豆因其耐旱性而闻名,被认为是一种不受气候变化限制的植物。通过为期2年的试验,研究了限水对4个豇豆品种不同生育期酚类物质、抗氧化能力和叶片养分浓度的影响。在第二叶期,启动两种灌溉制度(分别在田间容量的75%和55%之后进行灌溉,以及水分充足和干旱胁迫处理)。在未成熟荚果期、未成熟种子期和干种子期采集植物样品,测定总酚和类黄酮含量,测定邻二酚和抗氧化能力,测定叶片养分浓度。结果:干旱条件下多酚类化合物含量和抗氧化能力均有所增加。然而,在两种灌溉方式下,未成熟豆荚的多酚化合物含量、抗氧化能力和叶片营养物质浓度均高于未成熟种子和干种子。各基因型中,ILC482的总酚类和邻二酚类含量最高,分别为6.9和3.57 mg / g-1干重。此外,ILC482基因型叶片的氮、磷、镁浓度较高。在干旱胁迫下,ILC482对ABTS自由基的清除能力(0.0083 mmol Trolox g-1干重)高于其他基因型。结论:干旱胁迫通过多酚类化合物、ABTS和DPPH自由基清除能力对豇豆产品品质产生影响,可作为缺水地区节水的一种有效策略。
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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来源期刊
Botanical Studies
Botanical Studies 生物-植物科学
CiteScore
5.50
自引率
2.90%
发文量
32
审稿时长
2.4 months
期刊介绍: Botanical Studies is an open access journal that encompasses all aspects of botany, including but not limited to taxonomy, morphology, development, genetics, evolution, reproduction, systematics, and biodiversity of all plant groups, algae, and fungi. The journal is affiliated with the Institute of Plant and Microbial Biology, Academia Sinica, Taiwan.
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