Effects of melatonin, proline, and salicylic acid on seedling growth, photosynthetic activity, and leaf nutrients of sorghum under salt stress.

IF 2.3 3区 生物学 Q2 PLANT SCIENCES Plant Direct Pub Date : 2024-03-13 eCollection Date: 2024-03-01 DOI:10.1002/pld3.574
Mehmet Sait Kiremit, Elif Öztürk, Hakan Arslan, Bhaskara Anggarda Gathot Subrata, Hasan Akay, Aigerim Bakirova
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Abstract

Soil salinization poses a significant challenge to the sustainability and productivity of agriculture worldwide. This issue continues to hinder plant growth, requiring innovative solutions to alleviate salt stress. Moreover, climate change accelerates soil salinization, which may soon spread to previously unaffected agricultural areas. Therefore, the present study evaluated the potential role of different seed priming agents (hydro (H), salicylic acid (SA), proline (P), and melatonin (MEL)) on seedlings and leaf macro and micronutrients of sorghum grown under four (.27, 2.5, 5.0, and 8.0 dS m-1) soil salinity conditions. Soil salinity drastically reduced all the growth parameters of sorghum seedlings, primarily the reduction in growth traits, which was remarkable after 2.5 dS m-1 soil salinity. In addition, plant height, shoot fresh weight, and stomata were reduced by 40.8%, 74.6%, and 36.5%, respectively, at 8.0 dS m-1 compared to .27 dS m-1. SA- and MEL-primed seeds mitigated the harmful effects of soil salinity by reducing Na+ accumulation in the leaves and increasing the K+/Na+ and Ca2+/Na+ ratios and photosynthetic activity under salt stress. However, the Zn2+, Mn2+, and Cu2+ contents of sorghum leaves increased with increasing soil salinity, and these nutrients also improved with seed priming by SA, MEL, and P. Considering all nutrients, MEL-primed sorghum seeds had better macro- and micro-nutrient uptake capacities than the H, SA, and P treatments under high soil salinity conditions. Finally, the present study showed that MEL-induced improvement in salt tolerance in sorghum seedlings was related to enhanced nutritional status, photosynthetic activity, and biomass production in salinized areas.

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褪黑素、脯氨酸和水杨酸对盐胁迫下高粱幼苗生长、光合作用活性和叶片养分的影响
土壤盐碱化对全球农业的可持续性和生产力构成了重大挑战。这一问题继续阻碍植物生长,需要创新的解决方案来缓解盐胁迫。此外,气候变化加速了土壤盐碱化,可能很快就会蔓延到以前未受影响的农业地区。因此,本研究评估了在四种(0.27、2.5、5.0 和 8.0 dS m-1)土壤盐度条件下种植的高粱,不同种子引发剂(水(H)、水杨酸(SA)、脯氨酸(P)和褪黑素(MEL))对其幼苗和叶片宏量与微量营养元素的潜在作用。土壤盐分大大降低了高粱幼苗的各项生长参数,主要是生长性状的降低,在土壤盐分达到 2.5 dS m-1 后更为显著。此外,与 0.27 dS m-1 相比,8.0 dS m-1 下的植株高度、嫩枝鲜重和气孔分别减少了 40.8%、74.6% 和 36.5%。在盐胁迫下,SA 和 MEL-primed 种子通过减少叶片中的 Na+ 积累、提高 K+/Na+ 和 Ca2+/Na+ 比率以及光合作用活性,减轻了土壤盐分的有害影响。考虑到所有养分,在高土壤盐度条件下,MEL-primed 高粱种子的宏观和微观养分吸收能力均优于 H、SA 和 P 处理。最后,本研究表明,MEL 诱导的高粱幼苗耐盐性的提高与盐渍化地区营养状况、光合作用和生物量的提高有关。
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来源期刊
Plant Direct
Plant Direct Environmental Science-Ecology
CiteScore
5.00
自引率
3.30%
发文量
101
审稿时长
14 weeks
期刊介绍: Plant Direct is a monthly, sound science journal for the plant sciences that gives prompt and equal consideration to papers reporting work dealing with a variety of subjects. Topics include but are not limited to genetics, biochemistry, development, cell biology, biotic stress, abiotic stress, genomics, phenomics, bioinformatics, physiology, molecular biology, and evolution. A collaborative journal launched by the American Society of Plant Biologists, the Society for Experimental Biology and Wiley, Plant Direct publishes papers submitted directly to the journal as well as those referred from a select group of the societies’ journals.
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