laurentii乳酸菌缓解玉米干旱胁迫,影响氧化状态、LEA基因、激素浓度和脂肪酸分配

IF 4.5 Q1 PLANT SCIENCES
Marko Bajus , Zuzana Vivodová , Michaela Bačovčinová , Eva Labancová , Danica Kučerová , Ágnes Horváthová , Kristína Holeková , Diana Hačkuličová , Renáta Vadkertiová , Karin Kollárová
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引用次数: 0

摘要

干旱胁迫对玉米生长有显著影响;因此,正在研究有可能减轻干旱对植物造成损害的新物质。本文研究了laurentii Papiliotrema CCY 17-3-24的生物刺激素潜能及其作用机制。不同酵母浓度(106、107、108和109 cells ml - 1)的laurentii悬浮液处理玉米籽粒的吸胀和萌发过程。在水分充足的植物中,酵母没有促进植物生长的作用;然而,在浓度为10⁷cells ml−1的情况下,它刺激了干旱胁迫玉米的生长(例如,茎干重增加21.6% %)。此外,与干旱胁迫植物相比,酵母处理植物的相对含水量和氧化胁迫均有所改善(例如,根部H2O2浓度降低46.1% %)。与未处理植物相比,酵母处理植物的LEA基因表达显著下调,该基因可由激素触发。虽然与未处理植物相比,酵母处理植物在干旱条件下的激素浓度(IAA, ABA)略有提高(IAA浓度增加约19. %),但laurentii的作用不太可能与其产生激素的能力有关,也不太可能与其改变脯氨酸积累的能力有关。然而,基于laurentii的产油性质,它对干旱植物的积极影响可能是由脂肪酸的产生和植物的吸收来解释的。脂肪酸浓度的增加支持了这一点,特别是在酵母处理过的植物的根部(增加了205.3 %)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The yeast Papiliotrema laurentii alleviates drought-induced stress in maize and affects oxidative status, LEA genes, hormone concentrations, and fatty acid allocation
Drought stress can significantly affect maize growth; hence, new substances with a potential to alleviate drought-induced damage in plants are being investigated. Here, we studied the biostimulant potential and mechanisms of the yeast Papiliotrema laurentii CCY 17–3–24. The maize grains were treated with P. laurentii suspensions of different yeast concentrations (106, 107, 108, and 109 cells ml−1) during the imbibition and germination. The yeast did not have plant-growth promoting effects in well-watered plants; however, it stimulated the growth of the drought-stressed maize in the concentration 10⁷ cells ml−1 (e.g., shoot dry weight by 21.6 %). Furthermore, the relative water content and oxidative stress were improved in plants treated with the yeast compared to drought-stressed plants (e.g., decreased H2O2 concentration by 46.1 % in roots). The expression of LEA genes, which can be triggered by hormones, was significantly downregulated in yeast-treated plants compared to untreated plants. Although the yeast-treated plants showed slightly improved hormone concentrations (IAA, ABA) in drought compared to untreated plants (IAA concentration increased approximately by 19 %), the action of P. laurentii was not likely connected to its ability to produce hormones, neither its ability to change the accumulation of proline. However, based on the oleaginous nature of P. laurentii, its positive influence on plants suffering from drought can be possibly explained by the production of fatty acids and their uptake by plants. This was supported by the increased concentration of fatty acids, especially in the roots of the yeast-treated plants (by 205.3 %).
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来源期刊
Current Plant Biology
Current Plant Biology Agricultural and Biological Sciences-Plant Science
CiteScore
10.90
自引率
1.90%
发文量
32
审稿时长
50 days
期刊介绍: Current Plant Biology aims to acknowledge and encourage interdisciplinary research in fundamental plant sciences with scope to address crop improvement, biodiversity, nutrition and human health. It publishes review articles, original research papers, method papers and short articles in plant research fields, such as systems biology, cell biology, genetics, epigenetics, mathematical modeling, signal transduction, plant-microbe interactions, synthetic biology, developmental biology, biochemistry, molecular biology, physiology, biotechnologies, bioinformatics and plant genomic resources.
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