Chen Juanli, Luo Yongqing, Zhao Xueyong, Li Yan, Mu Junpeng
Ecological Security and Protection Key Laboratory of Sichuan Province, Mianyang Normal University, Mianyang 621000, China.
Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China.
Plants (Basel). 2024 Sep 18;13(18):2601. doi: 10.3390/plants13182601.
(L.) Moq. is a highly prevalent xerophytic species found throughout northern China. It is suitable for cultivation in semi-arid sandy environments and may establish roots in arid desert locations. This species plays a pioneering and exploratory role in the colonization of desert plants. In this study, we selected from the Urat desert steppe (UD) and Horqin sandy land (HS) to explore their adaptation mechanisms to drought and rehydration environments by using the pot weighing control method to simulate an arid environment. The findings showed that the control (watering to 60-65% of field capacity) exceeded its required amount and the leaves turned yellow. The chlorophyll content was lower than those under moderate and severe drought, and rehydration caused a decrease. However, the contents of malondialdehyde, soluble sugar, and proline in the drought treatment were higher than those in the control. Under moderate and severe drought, the chlorophyll content and the quantum efficiency of photosystem II (v/m) of from UD were higher than those from HS. During drought and rehydration processes, the proline content was relatively lower, while the activities of peroxidase (POD), superoxide dismutase (SOD), and catalase (CAT) and the content of soluble sugar and soluble protein were higher. However, antioxidant enzymes and osmoregulators from UD were higher than those from HS. The results suggest that the stronger ability of to endure drought environments in UD is due to the high level of antioxidant enzymes and osmoregulators, which are conducive to relieving cell membrane damage when subjected to drought and rehydration.
（L.）Moq.是一种在中国北方广泛分布的旱生植物。它适合在半干旱沙地环境中种植，也可能在干旱沙漠地区扎根。该物种在沙漠植物的定殖过程中发挥着先锋和探索作用。在本研究中，我们从乌拉特荒漠草原（UD）和科尔沁沙地（HS）选取[具体植物名称未给出]，采用盆栽称重控制法模拟干旱环境，以探究它们对干旱和复水环境的适应机制。结果表明，对照处理（浇水至田间持水量的60 - 65%）水分过量，叶片变黄。叶绿素含量低于中度和重度干旱处理，复水后叶绿素含量下降。然而，干旱处理下丙二醛、可溶性糖和脯氨酸的含量高于对照。在中度和重度干旱条件下，来自UD的[具体植物名称未给出]的叶绿素含量和光系统II的量子效率（v/m）高于来自HS的。在干旱和复水过程中，脯氨酸含量相对较低，而过氧化物酶（POD）、超氧化物歧化酶（SOD）和过氧化氢酶（CAT）的活性以及可溶性糖和可溶性蛋白质的含量较高。然而，来自UD的抗氧化酶和渗透调节物质高于来自HS的。结果表明，UD的[具体植物名称未给出]具有更强的耐旱能力，这归因于其高水平的抗氧化酶和渗透调节物质，有利于在干旱和复水时减轻细胞膜损伤。
