文献类型：期刊文献

英文题名：NRAMP1 promotes iron uptake at the late stage of iron deficiency in poplars

作者：Chen, Hui-Min[1,2,4] Wang, Yi-Ming[3] Yang, Hai-Ling[3] Zeng, Qing-Yin[1,2,4] Liu, Yan-Jing[1,2]

第一作者：Chen, Hui-Min

通信作者：Liu, YJ[1];Liu, YJ[2]

机构：[1]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[2]Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China;[3]Beijing Forestry Univ, Coll Biol Sci & Biotechnol, Beijing 100083, Peoples R China;[4]Univ Chinese Acad Sci, Beijing 100049, Peoples R China

年份：2019

卷号：39

期号：7

起止页码：1235-1250

外文期刊名：TREE PHYSIOLOGY

收录：;Scopus(收录号：2-s2.0-85074493195);WOS:【SCI-EXPANDED(收录号:WOS:000493055000013)】；

基金：This study was supported by the Chinese Academy of Forestry (CAFYBB2018ZX002) and the National Natural Science Foundation of China (31500547 and 31425006).

语种：英文

外文关键词：Fe2+ transporter; iron deficiency; NRAMP1; poplars

摘要：Iron (Fe) is an essential micronutrient for plant survival and proliferation. Plants have evolved complex mechanisms to maintain Fe homeostasis in response to Fe deficiency. In this study, we evaluated the physiological, biochemical and transcriptomic differences between poplars grown under Fe-sufficient and Fe-deficient conditions to elucidate the mechanistic responses of poplars to Fe deficiency. Our results revealed that chlorophyll synthesis and photosynthesis were inhibited under Fe-deficient conditions. The inhibition of these pathways caused chlorosis and reduced shoot growth. Although both photosynthetic systems (PSI and PSII) were inhibited under Fe limitation, PSI was affected more severely and earlier than PSII. Fe deficiency also promoted root growth and increased the accumulation of divalent metal ions in roots. IRT1 and NRAMP1 are both Fe2+ transporters for iron uptake in Arabidopsis. In this study, however, only NRAMP1 was induced to promote Fe2+ uptake in roots at the late stage of Fe deficiency response. It indicated that NRAMP1, rather than the more well-known IRT1, might be a major Fe2+ transporter at the late stage of Fe-deficiency in poplars.