Salt-excluder rootstock improves physio-biochemical responses of grafted grapevine plants subjected to salinity stress

IF 5.4 Q1 PLANT SCIENCES Current Plant Biology Pub Date : 2024-01-07 DOI:10.1016/j.cpb.2023.100316
Elania Freire da Silva , Hugo Rafael Bentzen Santos , Jean Pierre Henry Balbaud Ometto , Alexandre Maniçoba da Rosa Ferraz Jardim , Thieres George Freire da Silva , Pedro José Hermínio , Adriano Nascimento Simões , Eduardo Souza , Sérgio Luiz Ferreira-Silva
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Abstract

This study tests the hypothesis that a more salt-excluder rootstock can attenuate salt stress in grapevine plants by enhancing photosynthesis and providing ionic and oxidative protection. Plants of ‘BRS Vitória’ variety, grafted with the rootstocks IAC 313 (salt-excluder) and SO4, were subjected to salinity by adding NaCl (0, 50, and 100 mM) for 30 days. Plants with SO4 showed more severe salt toxicity symptoms in leaves and lower chlorophyll content under salinity. Conversely, plants with IAC 313 showed improved photosynthesis and stomatal conductance, along with higher carboxylation efficiency under salt compared to SO4. Under salinity, plants with SO4 showed higher losses of K+ in stems, roots, and petioles, as well as increased accumulation of Na+ in these organs, relative to IAC 313. Furthermore, plants with IAC 313 had lower leaf Na+ content under salinity and reduced leaf Cl content at 50 mM NaCl, a response associated with a higher Na+ allocation in petioles of IAC 313. At 50 mM, IAC 313 exhibited better photochemical activity, as indicated by electron transport rate and non-photochemical quenching. However, at 100 mM, both rootstocks showed similar trends, suggesting that the photosynthetic restriction was primarily due to stomatal disturbances. Plants with IAC 313 showed better APX activity and ascorbate balance under salinity. IAC 313 showed more salt-resistance traits than SO4, although the growth was similarly affected in both rootstocks. This response could be due to the reduced time of salt treatment (30 days). In summary, our data indicate that IAC 313 rootstock possesses better salt tolerance traits than SO4.

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排盐砧木改善了嫁接葡萄植株在盐分胁迫下的生理生化反应
本研究验证了一个假设,即盐分排除能力更强的砧木可以通过提高光合作用和提供离子及氧化保护来减轻葡萄植株的盐分胁迫。用IAC 313(排盐砧木)和SO4砧木嫁接'BRS Vitória'品种的植株,通过添加NaCl(0、50和100 mM)进行为期30天的盐渍化试验。在盐度条件下,SO4 的植株叶片表现出更严重的盐毒症状,叶绿素含量也更低。相反,与 SO4 相比,施用 IAC 313 的植物在盐分条件下光合作用和气孔导度得到改善,羧化效率更高。在盐度条件下,与 IAC 313 相比,施用 SO4 的植株在茎、根和叶柄中的 K+ 损失更多,在这些器官中的 Na+ 积累也更多。此外,在盐度条件下,IAC 313 植物的叶片 Na+ 含量较低,在 50 mM NaCl 条件下,叶片 Cl- 含量降低,这种反应与 IAC 313 叶柄中较高的 Na+ 分配有关。在 50 毫摩尔条件下,IAC 313 表现出更好的光化学活性,电子传递速率和非光化学淬灭表明了这一点。然而,在 100 毫摩尔浓度下,两种砧木表现出相似的趋势,表明光合作用受限主要是由于气孔干扰造成的。IAC 313 的植株在盐度条件下表现出更好的 APX 活性和抗坏血酸平衡。IAC 313 比 SO4 表现出更强的抗盐性,尽管两种砧木的生长受到的影响相似。这种反应可能是由于盐处理的时间(30 天)缩短了。总之,我们的数据表明,IAC 313 砧木比 SO4 具有更好的耐盐性状。
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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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