碘酸钾在减轻缺水对咖啡植株的损害中的作用

IF 3.4 3区 农林科学 Q2 ENVIRONMENTAL SCIENCES
Otávio Vitor Souza Andrade, Jucelino de Sousa Lima, Taís Teixeira das Neves, Everton Geraldo de Morais, Pedro Antônio Namorato Benevenute, Leônidas Canuto dos Santos, Vitor L. Nascimento, Luiz Roberto Guimarães Guilherme, Paulo Eduardo Ribeiro Marchiori
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引用次数: 0

摘要

缺水会影响植物的生长和发育,造成生理紊乱,引发氧化应激。作为一种替代方法,外源施用某种分子可以最大限度地减少这些损害,降低生产力损失。补充碘(I)对受胁迫植物有很大好处。然而,目前还没有关于碘能减轻咖啡植物缺水胁迫的研究结果。咖啡植株生长在完全随机排列的 10 升花盆中。测试了四种剂量的碘酸钾(KIO3):0.0、2.5、5.0 和 10.0 mg dm-3 的土壤,然后对植物进行缺水处理,并与不添加 KIO3 和缺水处理(对照组)进行比较。缺水损害了咖啡植株的生物量和相对生长。然而,施用 2.5 mg dm-3 的 KIO3 可减轻一些症状,提高光合效率、相对含水量、耐缺水指数、光合色素含量和相容性渗透溶质。此外,我们还观察到抗氧化酶系统受到刺激,从而提高了细胞膜的稳定性。尽管 5.0 和 10.0 毫克/立方米-3 的 KIO3 剂量能诱导更高的抗氧化系统活化,但我们观察到过量的 KIO3 可能会产生毒性效应。通过土壤施用 2.5 毫克/立方米-3 KIO3 可以调节新陈代谢和生化过程,从而改善缺水咖啡植物的生长和发育状况,这表明它可以作为在干旱条件下管理咖啡植物的一种可行策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

The Role of Potassium Iodate in Mitigating the Damages of Water Deficit in Coffee Plants

The Role of Potassium Iodate in Mitigating the Damages of Water Deficit in Coffee Plants

Water deficit impacts plant growth and development, causing physiological disturbances that trigger oxidative stress. As an alternative, exogenous application of a sort of molecule can minimize these damages and reduce productivity losses. The iodine (I) supplementation has shown considerable benefits to stressed plants. Nevertheless, there are no results about I mitigating the water deficit stress in coffee plants. Coffee plants were grown in 10-L pots arranged wholly randomized. Four doses of potassium iodate (KIO3) were tested: 0.0, 2.5, 5.0, and 10.0 mg dm−3 of soil, then the plants were subjected to water deficit and compared to treatments with no KIO3 and water deficit (Control). The water deficit damaged biomass and relative growth of the coffee plant. However, the application of 2.5 mg dm−3 of KIO3 attenuated some symptoms, increasing: photosynthetic efficiency, relative water content, water deficit tolerance index, content of photosynthetic pigments, and compatible osmolytes. In addition, we observed the stimulation of the antioxidant enzymatic system, allowing higher cell membrane stability. Doses of 5.0 and 10.0 mg dm−3 of KIO3, in spite of induced higher activation of the antioxidant system it was observed a possible toxicity effect due to excess KIO3. The application of 2.5 mg dm−3 KIO3 via soil can modulate metabolic and biochemical processes, allowing an improvement in the growth and development of coffee plants subjected to water deficit, suggesting that it could serve as a viable strategy for managing coffee plants under drought conditions.

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来源期刊
Journal of Soil Science and Plant Nutrition
Journal of Soil Science and Plant Nutrition Agricultural and Biological Sciences-Soil Science
CiteScore
5.90
自引率
10.30%
发文量
331
审稿时长
9 months
期刊介绍: The Journal of Soil Science and Plant Nutrition is an international, peer reviewed journal devoted to publishing original research findings in the areas of soil science, plant nutrition, agriculture and environmental science. Soil sciences submissions may cover physics, chemistry, biology, microbiology, mineralogy, ecology, pedology, soil classification and amelioration. Plant nutrition and agriculture submissions may include plant production, physiology and metabolism of plants, plant ecology, diversity and sustainability of agricultural systems, organic and inorganic fertilization in relation to their impact on yields, quality of plants and ecological systems, and agroecosystems studies. Submissions covering soil degradation, environmental pollution, nature conservation, and environmental protection are also welcome. The journal considers for publication original research articles, technical notes, short communication, and reviews (both voluntary and by invitation), and letters to the editor.
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