Salicylic acid alleviates the adverse effects of salt stress in Torreya grandis cv. Merrillii seedlings by activating photosynthesis and enhancing antioxidant systems.
Salicylic acid alleviates the adverse effects of salt stress in Torreya grandis cv. Merrillii seedlings by activating photosynthesis and enhancing antioxidant systems.
复制标题
DOI：
10.1371/journal.pone.0109492
复制
发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Wu J
中科院分区：
文献类型：
--
作者：
Li T;Hu Y;Du X;Tang H;Shen C;Wu J
盐胁迫是限制植物生长和生产力的主要因素。水杨酸（SA）已被证明可以改善环境胁迫对植物的不利影响。为研究SA对大香榧（t.g grandis）树盐胁迫的保护作用，通过盆栽试验，分析了0.2%和0.4% NaCl条件下大香榧（t.g grandis）生物量、相对含水量（RWC）、叶绿素含量、净光合作用（Pn）、气体交换参数、相对泄漏电导率（REC）、丙二醛（MDA）含量、超氧化物歧化酶（SOD）和过氧化物酶（POD）活性的变化。盐胁迫下大叶参幼苗生长速率降低，RWC和Pn含量降低，REC和MDA含量升高。叶面施用SA有效提高了叶绿素（chl (a+b)）含量、RWC、净CO2同化率（Pn）和脯氨酸含量，提高了SOD、CAT和POD活性，降低了REC和MDA含量的升高。这些变化增加了大叶松对盐胁迫的适应能力，从而增加了地上部和根部的干物质。而在0%和0.2% NaCl胁迫下，根、茎干质量与对照差异不显著。SA诱导了大叶茅的耐盐性，增加了大叶茅的生物量。通过提高叶绿素含量和抗氧化酶活性，激活光合过程，减轻膜损伤。更好地了解盐胁迫对大叶松的影响是至关重要的，这将为将来扩大大叶松人工林和恢复大叶松物种提供知识。
Salt stress is a major factor limiting plant growth and productivity. Salicylic acid (SA) has been shown to ameliorate the adverse effects of environmental stress on plants. To investigate the protective role of SA in ameliorating salt stress on Torreya grandis (T. grandis) trees, a pot experiment was conducted to analyze the biomass, relative water content (RWC), chlorophyll content, net photosynthesis (Pn), gas exchange parameters, relative leakage conductivity (REC), malondialdehyde (MDA) content, and activities of superoxide dismutase (SOD) and peroxidase (POD) of T. grandis under 0.2% and 0.4% NaCl conditions with and without SA. The exposure of T. grandis seedlings to salt conditions resulted in reduced growth rates, which were associated with decreases in RWC and Pn and increases in REC and MDA content. The foliar application of SA effectively increased the chlorophyll (chl (a+b)) content, RWC, net CO2 assimilation rates (Pn), and proline content, enhanced the activities of SOD, CAT and POD, and minimized the increases in the REC and MDA content. These changes increased the capacity of T. grandis in acclimating to salt stress and thus increased the shoot and root dry matter. However, when the plants were under 0% and 0.2% NaCl stress, the dry mass of the shoots and roots did not differ significantly between SA-treated plants and control plants. SA induced the salt tolerance and increased the biomass of T. grandis cv. by enhancing the chlorophyll content and activity of antioxidative enzymes, activating the photosynthetic process, and alleviating membrane injury. A better understanding about the effect of salt stress in T. grandis is vital, in order gain knowledge over expanding the plantations to various regions and also for the recovery of T. grandis species in the future.
登录
查看更多内容
影响因子：
3.4
作者：
Chen, Bao-Qiong;Cui, Xiang-Yu;Yun, Yeo-Pyo
通讯作者：
Yun, Yeo-Pyo
影响因子：
7.4
作者：
Allakhverdiev, SI;Sakamoto, A;Murata, N
通讯作者：
Murata, N
影响因子：
2.6
作者：
Idrees, Mohd;Naeem, M.;Moinuddin
通讯作者：
Moinuddin
DOI：
10.1501/tarimbil_0000000444
发表时间：
2007-01-01
影响因子：
0.9
作者：
Kaydan, Digdem;Yagmur, Mehmet;Okut, Nese
通讯作者：
Okut, Nese
影响因子：
4.3
作者：
Gunes, Aydin;Inal, Ali;Cicek, Nuray
通讯作者：
Cicek, Nuray