Loquat(Eriobotrya japonica Lindl.)is an evergreen fruit tree species of the Rosaceae,and its unique flowering time greatly hinders its production.To explore the artificial regulation of loquat flowering time,we remove...Loquat(Eriobotrya japonica Lindl.)is an evergreen fruit tree species of the Rosaceae,and its unique flowering time greatly hinders its production.To explore the artificial regulation of loquat flowering time,we removed the main inflorescence(by cutting it)to induce reflowering.For different loquat tree cultivars with different stages,the inflorescence was removed by cutting the main floral axis at two alternative positions:the upper or the lower position beneath the inflorescence,and it was found that the proportion of reflowering resulting from removing the upper position of the main floral axis of yellow-flesh loquat cultivars during the full-bloom stage was the highest.In addition,compared with those of the normal-growing panicles,the number of flower buds and branch axes of the reflowering panicles decreased significantly after cutting.Importantly,these newly produced inflorescences flowered 2–4 months later than normal-growing inflorescences did,effectively prolonging both the flowering and fruiting time.In addition,qRT-PCR results showed that EjFT1,EjFT2,EjAP1–1 and EjAP1–2 were highly expressed in the floral axis.These findings highlighted a new method for extending the production cycle of loquat and provided a reference for the flowering regulation of loquat and other economically important fruit tree species.展开更多
经调查发现,在重庆发生的枇杷花腐病症状有2种类型:干腐型和湿腐型。通过病原菌形态特征、培养性状和致病性测定,初步鉴定这两种症状分别由拟盘多毛孢菌[Pestalotiopsis eriobotrifolia(Guba)Chen et Cao]和灰葡萄孢菌(Botrytis cinerea...经调查发现,在重庆发生的枇杷花腐病症状有2种类型:干腐型和湿腐型。通过病原菌形态特征、培养性状和致病性测定,初步鉴定这两种症状分别由拟盘多毛孢菌[Pestalotiopsis eriobotrifolia(Guba)Chen et Cao]和灰葡萄孢菌(Botrytis cinerea Pers.)引起。枇杷花腐病害的发生与环境湿度有关,且湿度越大,病害发生越严重。展开更多
基金supported by Shaoguan City Science and Technology Planning Project(Social Development Direction-Supporting Scientific Research Workers Project)(Grant No.200811094530739)the Key Realm R&D Program of Guang Dong Provide(Grant No.2018B020202011)+2 种基金Open Fund of Key laboratory of Loquat Germplasm Innovation and Utilization(Putian University)Fujian Province University(Grant No.2019005)Guangdong Province College Students’Innovative and Entrepreneurial Training Program(Grant No.S202010576014X)。
文摘Loquat(Eriobotrya japonica Lindl.)is an evergreen fruit tree species of the Rosaceae,and its unique flowering time greatly hinders its production.To explore the artificial regulation of loquat flowering time,we removed the main inflorescence(by cutting it)to induce reflowering.For different loquat tree cultivars with different stages,the inflorescence was removed by cutting the main floral axis at two alternative positions:the upper or the lower position beneath the inflorescence,and it was found that the proportion of reflowering resulting from removing the upper position of the main floral axis of yellow-flesh loquat cultivars during the full-bloom stage was the highest.In addition,compared with those of the normal-growing panicles,the number of flower buds and branch axes of the reflowering panicles decreased significantly after cutting.Importantly,these newly produced inflorescences flowered 2–4 months later than normal-growing inflorescences did,effectively prolonging both the flowering and fruiting time.In addition,qRT-PCR results showed that EjFT1,EjFT2,EjAP1–1 and EjAP1–2 were highly expressed in the floral axis.These findings highlighted a new method for extending the production cycle of loquat and provided a reference for the flowering regulation of loquat and other economically important fruit tree species.
