title: The endogenous plant hormones and ratios regulate sugar and dry matter accumulation in Jerusalem artichoke in salt-soil.
abstract: The changes in content of endogenous hormones in stolons and tubers of Jerusalem artichoke (Helianthus tuberosus L.) regulate tuber growth, but the specific knowledge about the importance of balance among the endogenous hormones is lacking. Two varieties of Jerusalem artichoke (NY-1 and QY-2) were tested for the endogenous zeatin (ZT), auxins (IAA), gibberellins (GA3) and abscisic acid (ABA) in regulating sugar and dry matter accumulation in tubers. The dry matter content and sugar accumulation in tubers were correlated positively with endogenous ZT and negatively with GA3content and GA3/ABA and IAA/ABA content ratios. Throughout the tuber formation, ZT content was higher in NY-1 than QY-2 tubers, whereas ABA content was higher in QY-2 than NY-1 tubers. The content ratios GA3/ABA and IAA/ABA were greater in NY-1 than QY-2 before tuber initiation, but QY-2 surpassed NY-1 during the tuber growth stage. The GA3/ABA and IAA/ABA content ratios declined during tuber growth. The results suggested that a dynamic balance of endogenous hormones played an important role in tuber development.
authors.affiliation: College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Lingling
authors.initials: L
authors.lastname: Li
authors.affiliation: College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Tianyun
authors.initials: T
authors.lastname: Shao
authors.affiliation: College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Yang
authors.affiliation: College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Manxia
authors.initials: M
authors.lastname: Chen
authors.affiliation: College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Xiumei
authors.initials: X
authors.lastname: Gao
authors.affiliation: College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China. Electronic address: longxiaohua@njau.edu.cn.
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Long
authors.affiliation: Institute of Agro-biotechnology, Jiangsu Academy of Agriculture Sciences, Nanjing 210014, China; Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China. Electronic address: shaohongbochu@126.com.
authors.forename: Hongbo
authors.initials: H
authors.lastname: Shao
authors.affiliation: College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Zhaopu
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Soil Science and Plant Nutrition, School of Earth and Environment, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.
authors.forename: Zed
authors.initials: Z
authors.lastname: Rengel
mesh_terms: D002241:Carbohydrates / Q000096:biosynthesis*; D006368:Helianthus / Q000502:physiology*; D010937:Plant Growth Regulators / Q000502:physiology*; D035281:Plant Tubers / Q000254:growth & development; D054712:Salinity; D012987:Soil / Q000737:chemistry*
chemical_list: D002241:Carbohydrates; D010937:Plant Growth Regulators; D012987:Soil
keywords: Endogenous hormones; Jerusalem artichoke; Salt-soil; Sugar; Tuber formation