Physiological analysis of the effect of altitudinal gradients on Leymus secalinus on the Qinghai-Tibetan Plateau.
Physiological analysis of the effect of altitudinal gradients on Leymus secalinus on the Qinghai-Tibetan Plateau.
复制标题
青藏高原海拔梯度对黑羊草影响的生理分析
DOI：
10.1371/journal.pone.0202881
复制
发表时间：
2018
期刊：
影响因子：
3.7
通讯作者：
Zhang P
中科院分区：
文献类型：
--
作者：
Cui G;Li B;He W;Yin X;Liu S;Lian L;Zhang Y;Liang W;Zhang P
在青藏高原，高海拔梯度会对植物分布产生不利影响，限制植物的生长和繁殖。赖草是青藏高原重要的饲料作物，具有优良的固沙和改良土壤能力。探讨海拔高度对红腹锦鸡儿生理特性的影响。以青藏高原8个不同海拔高度的青海省民和县和湟中县的黑麦（secalinus）为材料，测定了叶片的脂质过氧化、叶绿素a（Chl a）、叶绿素B（Chl B）、总类胡萝卜素（Car）、可溶性蛋白、脯氨酸和可溶性糖含量以及超氧化物歧化酶（SOD）、过氧化氢酶（CAT）和过氧化物酶（POD）活性。在初花期采集叶片，两个相邻采集点之间的平均垂直距离约为100米。叶绿素a和叶绿素B含量的减少和Car含量的增加可以使植物减弱对光的吸收，避免叶绿体的光损伤。丙二醛（MDA）含量的降低与膜脂过氧化程度的降低有关，CAT、SOD和POD活性的变化反映了高海拔植物对活性氧（ROS）的清除能力增强。脯氨酸和可溶性糖含量随海拔升高而增加，表明脯氨酸和可溶性糖在高寒地区植物的渗透调节中起着重要作用。结果表明，海拔梯度对L.研究了青藏高原裸子蕨的适应机制和生存对策。secalinus是多种保护策略的综合作用。
On the Qinghai-Tibetan Plateau, the high-altitudinal gradients can negatively affect plant distribution and limit plant growth and reproduction. Leymus secalinus (Georgi) Tzvel. is an important forage crop on the Qinghai-Tibetan Plateau and has an excellent ability to fix sand and improve soil. To evaluate the effect of altitude on the physiological characteristics of L. secalinus on the Qinghai-Tibetan Plateau, we measured the lipid peroxidation; chlorophyll a (Chl a), chlorophyll b (Chl b), total carotenoid (Car), soluble protein, proline and soluble sugar contents; and the activities of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) in leaves from eight different altitudes in Minhe County and Huangzhong County. The leaves were collected at the initial bloom stage, and the average vertical distance between two adjacent collection sites was approximately 100 meters. The reduction in Chl a and Chl b contents and the increase in Car contents can allow plants to weaken their light absorption and avoid photodamage to the chloroplast. The decrease in malondialdehyde (MDA) content associated with lower lipid peroxidation, and the changes of CAT, SOD and POD activities reflect a higher reactive oxygen species (ROS) scavenging capacity in high-altitude plants. The increase in proline and soluble sugar contents with elevation suggests that proline and soluble sugar may play a key role in the osmotic adjustment of plants in alpine regions. The results suggested that altitudinal gradients negatively affect L. secalinus on the Qinghai-Tibetan Plateau and that the adaptation mechanism and survival strategies of L. secalinus were attributed to the combined effects of multiple protective strategies.
登录
查看更多内容
影响因子：
5.6
作者：
Karagiannis E;Tanou G;Samiotaki M;Michailidis M;Diamantidis G;Minas IS;Molassiotis A
通讯作者：
Molassiotis A
影响因子：
7.3
作者：
DEMMIGADAMS, B;ADAMS, WW
通讯作者：
ADAMS, WW
影响因子：
2.6
作者：
Ahmad, Khawaja Shafique;Hameed, Mansoor;Akhtar, Noreen
通讯作者：
Akhtar, Noreen
气候变化和人类活动对青藏高原高寒草原的影响
影响因子：
6.2
作者：
Chen, Baoxiong;Zhang, Xianzhou;Yu, Chengqun
通讯作者：
Yu, Chengqun
DOI：
10.1021/i560156a015
发表时间：
1946-01-01
影响因子：
--
作者：
DREYWOOD, R
通讯作者：
DREYWOOD, R