Exogenous cytokinin application to Actinidia chinensis var. deliciosa ‘Hayward’ fruit promotes fruit expansion through water uptake

作     者：Simona Nardozza Helen L Boldingh Mark W Wohlers Andrew P Gleave Zhiwei Luo Guglielmo Costa Elspeth A MacRae Michael J Clearwater Annette C Richardson 

作者机构：The New Zealand Institute for Plant&Food Research Limited(PFR)Mt Albert Research CentrePrivate Bag 92169AucklandNew Zealand PFRRuakura Research CentrePrivate Bag 3123HamiltonNew Zealand Dipartimento di Scienzie AgrarieUniversitàdi BolognaVia Fanin 46Bologna40127Italy PFRTe Puke Research CentreTe Puke3182New Zealand PFRKerikeri Research CentrePrivate Bag 23KerikeriNew Zealand ScionTe Papa Tipu Innovation ParkPrivate Bag 3020RotoruaNew Zealand University of WaikatoSchool of SciencePrivate Bag 3105HamiltonNew Zealand 

出 版 物：《Horticulture Research》 (园艺研究（英文）)

年 卷 期：2017年第4卷第1期

页      面：131-141页

核心收录：

学科分类：09[农学] 0902[农学-园艺学] 090201[农学-果树学] 

基　　金：This work was supported by Core Premium Kiwifruit funding 

主　　题：CPPU Actinidia expansion 

摘      要：Exogenous application of a cytokinin-like compound forchlorfenuron(CPPU)can promote fruit growth,although often at the expense of dry matter(DM),an important indicator of fruit *** chinensis ***‘Hayward’fruit are very responsive to CPPU treatments,but the mechanism underlying the significant fruit weight increase and associated decrease in DM is *** this study,we hypothesised that CPPU-enhanced growth increases fruit carbohydrate demand,but limited carbohydrate supply resulted in decreased fruit *** fruit development,CPPU effects on physical parameters,metabolites,osmotic pressure and transcriptional changes were assessed under conditions of both standard and a high carbohydrate *** showed that CPPU increased fruit fresh weight but the dramatic DM decrease was not carbohydrate *** glucose and fructose concentrations contributed to an increase in soluble carbohydrate osmotic pressure,which was correlated with increased water accumulation in CPPU-treated fruit and up-regulation of water channel aquaporin gene PIP2.4 at 49 days after *** analysis suggested that the molecular mechanism contributing to increased glucose and fructose concentrations was altered by carbohydrate *** standard carbohydrate supply,the early glucose increase in CPPU fruit was associated with reduced starch synthesis and increased starch *** carbohydrate supply was high,the early glucose increase in CPPU fruit was associated with a general decrease in starch synthesis but up-regulation of vacuolar invertase and fructokinase *** conclude that CPPU affected fruit expansion by increasing the osmotically-driven water uptake and its effect was not carbohydrate supply-limited.