丛枝菌根真菌物种改善了干旱胁迫下大豆品种的脂肪酸谱和营养状况。
Arbuscular mycorrhizal fungi species improve the fatty acids profile and nutrients status of soybean cultivars grown under drought stress.
机构信息
Department of Agriculture and Food Science, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Horticulture Department, College of Agricultural Engineering Sciences, University of Sulaimani, Sulaimani, Iraq.
出版信息
J Appl Microbiol. 2022 Mar;132(3):2177-2188. doi: 10.1111/jam.15326. Epub 2021 Oct 20.
AIMS
To investigate the effects of arbuscular mycorrhizal fungi (AMF) species on the absorption and distribution of mineral nutrients in soybean cultivars under drought stress, an experiment was carried out through a factorial method in the form of randomized complete blocks with six replicates in 2020.
METHODS AND RESULTS
Experimental factors include: drought stress at three irrigation levels (well-watered [WW], medium stress [MS] and severe stress [SS], i.e., 100%, 70% and 40% FC), soybean cultivars at two levels (Sepideh and Williams), and mycorrhizae application at four levels (nonapplication, Funneliformis mosseae, Glomus hoi, Rhizophagus intraradices). The results indicated that drought stress increased the concentration of grain potassium (K) and sodium (Na), leaf K, stem and leaf Na, and decreased the concentrations of grain phosphorus (P), copper (Cu), and zinc (Zn), leaf P, stem and leaf Cu, and manganese (Mn). In addition, there was no significant difference in terms of concentrations of grain K. The highest reduction was observed under SS conditions (40% FC). G. hoi colonization increased the concentrations of grain P and Zn, leaf K and Cu and stem Mn under SS conditions (40% FC). In addition, compared to Sepideh cv., Williams cv. showed higher stress resistance. Seed oil content decreased in the plants exposed to drought stress. Severe drought treatments have a deleterious effect on seed fatty acid composition, resulting in enhanced linoleic, oleic and linolenic acids.
CONCLUSION
AMF colonization is a useful tool for improving the plant nutrient uptake, fatty acid profile, efficiency of resource utilization and stabilizing yield, hence reducing the production risks of crops grown under drought stress conditions. It was concluded that AMF colonization should be employed to help alleviate the adverse effects of drought stress.
SIGNIFICANCE OF STUDY
AMF colonization is an effective biotechnological strategy that can alter nutrient uptake and fatty acid composition and enhance oil quality in soybean cultivars under drought conditions.
目的
为了研究丛枝菌根真菌（AMF）物种对干旱胁迫下大豆品种矿质养分吸收和分配的影响，本研究采用随机完全区组设计，于 2020 年进行了一项两因素试验，其中两个因素分别为灌溉水平（充分灌溉[WW]、中度胁迫[MS]和重度胁迫[SS]，即 100%、70%和 40%FC）和大豆品种（Sepideh 和 Williams），四个处理分别为不接种、接种摩西管柄囊霉、接种厚垣轮枝菌和接种内养根毛囊霉。
方法与结果
结果表明，干旱胁迫增加了籽粒钾（K）和钠（Na）、叶片 K、茎和叶 Na 的浓度，降低了籽粒磷（P）、铜（Cu）和锌（Zn）、叶片 P、茎和叶 Cu、锰（Mn）的浓度。此外，籽粒 K 浓度没有显著差异。在 SS 条件下（40%FC），降幅最大。在 SS 条件下（40%FC），接种 G. hoi 增加了籽粒 P 和 Zn、叶片 K 和 Cu 以及茎 Mn 的浓度。此外，与 Sepideh 品种相比，Williams 品种表现出更高的抗胁迫能力。暴露于干旱胁迫下的植株种子油含量下降。严重干旱处理对种子脂肪酸组成有不利影响，导致亚油酸、油酸和亚麻酸增加。
结论
AMF 定殖是一种提高植物养分吸收、脂肪酸组成、资源利用效率和稳定产量的有用工具，从而降低在干旱胁迫条件下种植作物的生产风险。因此，AMF 定殖应该被用来帮助缓解干旱胁迫的不利影响。
研究意义
AMF 定殖是一种有效的生物技术策略，可改变干旱条件下大豆品种的养分吸收和脂肪酸组成，提高油质。
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