文献类型：期刊文献

英文题名：Responses of Sphagneticola trilobata, Sphagneticola calendulacea and Their Hybrid to Drought Stress

作者：Zhang, Qilei[1,2] Huang, Jundong[1] Ke, Weiqian[1] Cai, Minling[1] Chen, Guangxin[1] Peng, Changlian[1]

第一作者：张启雷;Zhang, Qilei

通信作者：Peng, CL[1]

机构：[1]South China Normal Univ, Sch Life Sci, Guangzhou Key Lab Subtrop Biodivers & Biomonitori, Guangdong Prov Key Lab Biotechnol Plant Dev, Guangzhou 510631, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Peoples R China

年份：2021

卷号：22

期号：20

外文期刊名：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES

收录：;Scopus(收录号：2-s2.0-85117939416);WOS:【SCI-EXPANDED(收录号:WOS:000716945100001)】；

基金：National Natural Science Foundation of China: 31870374, 32171493; Natural Science Foundation of Guangdong Province: 2017A030313167.

语种：英文

外文关键词：abscisic acid; antioxidant; biological invasion; drought; hybrid; Sphagneticola trilobata

摘要：Sphagneticola trilobata is an invasive plant in South China. A hybrid between S. trilobata and Sphagneticola calendulacea (a native related species) has also been found in South China. The drought resistance of S. calendulacea, S. trilobata and their hybrid was studied in this paper. Under drought stress, the leaves of S. trilobata synthesized more abscisic acid (ABA) than those of the other species to reduce stomatal opening and water loss. The activities of antioxidant enzymes were the highest in S. trilobata and the lowest in S. calendulacea. The leaves of S. calendulacea suffered the most serious damage, and their maximum photochemical efficiency was the lowest. RNA-sequencing ware used to analyze the expression levels of genes in ABA, antioxidant enzyme, sugar and proline synthesis and photosynthesis pathways. Further real-time PCR detection verified the RNA-sequence results, and the results were in accordance with the physiological data. The results showed that S. trilobata was the most drought tolerant, and the drought tolerance of the hybrid did not show heterosis but was higher than S. calendulacea. Therefore, compared with S. trilobata and the hybrid, the population number and distribution of S. calendulacea may be less in arid areas.