title: Water Status Related Root-to-Shoot Communication Regulates the Chilling Tolerance of Shoot in Cucumber (Cucumis sativus L.) Plants.
abstract: Although root-to-shoot communication has been intensively investigated in plants under drought, few studies have examined root-to-shoot communication under chilling. Here we explored whether root-to-shoot communication contributes to the chilling-light tolerance of cucumber shoots and clarified the key signal involves in this communication. After leaf discs chilling-light treatment, the photoinhibitions of Photosystem I (PSI) and Photosystem II (PSII) were similar in leaf discs of two cucumber varieties (JY-3 and JC-4). When the whole plants, including roots, were chilled under light, the photosynthetic performances in JC-4 leaves decreased more seriously than that in JY-3 leaves. However, when the water status of leaves was maintained by warming roots or floating the attached leaves on water, the PSII activity and amount of PSI in the leaves of the two varieties were similar after chilling-light treatment. In addition, the differences of PSII activities and amount of PSI between the two varieties under whole plant chilling-light treatment were independent of ABA pretreatment. Above results indicate that (1) the better water status in leaves under chilling contributes to the higher chilling tolerance of JY-3; (2) the water status, rather than an ABA signal, dominates root-to-shoot communication under chilling and the chilling tolerance of cucumber shoot.
authors.affiliation: State Key Lab of Crop Biology, Tai'an, Shandong Province, China.|College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong Province, China.|College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, Shandong Province, China.
authors.forename: Zi-Shan
authors.initials: ZS
authors.lastname: Zhang
authors.affiliation: State Key Lab of Crop Biology, Tai'an, Shandong Province, China.|College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong Province, China.
authors.forename: Mei-Jun
authors.initials: MJ
authors.lastname: Liu
authors.affiliation: State Key Lab of Crop Biology, Tai'an, Shandong Province, China.|College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong Province, China.
authors.forename: Hui-Yuan
authors.initials: HY
authors.lastname: Gao
authors.affiliation: State Key Lab of Crop Biology, Tai'an, Shandong Province, China.|College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong Province, China.
authors.forename: Li-Qiao
authors.initials: LQ
authors.lastname: Jin
authors.affiliation: State Key Lab of Crop Biology, Tai'an, Shandong Province, China.|College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong Province, China.
authors.forename: Yu-Ting
authors.initials: YT
authors.lastname: Li
authors.affiliation: State Key Lab of Crop Biology, Tai'an, Shandong Province, China.|College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, Shandong Province, China.
authors.forename: Qing-Ming
authors.initials: QM
authors.lastname: Li
authors.affiliation: State Key Lab of Crop Biology, Tai'an, Shandong Province, China.|College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, Shandong Province, China.
authors.forename: Xi-Zhen
authors.initials: XZ
authors.lastname: Ai
mesh_terms: D000220:Adaptation, Biological; D003080:Cold Temperature; D018553:Cucumis sativus / Q000502:physiology*; D008027:Light; D010788:Photosynthesis; D018515:Plant Leaves; D018517:Plant Roots; D018520:Plant Shoots; D036226:Seedlings; D014867:Water
chemical_list: D014867:Water