关键词: 枇杷, 脱水素, 基因表达, 果实发育期, 季节性变化, 干旱胁迫, ABA

Abstract: In order to further reveal the possible functions of different dehydrin family members in loquat（Eriobotrya japonica Lindl.）（EjDHN），the expression patterns of seven EjDHNs were analyzed with various organs，fruit at different development stages，leaves from different seasons，leaves under drought stress and ABA treatment in cultivar‘Ninghaibai’. It was observed that EjDHN5 was highly expressed in all organs tested，EjDHN4 was mainly expressed in flower，while EjDHN2，EjDHN3，EjDHN6 and EjDHN7 were expressed especially high in stem. In fruit，all members，only except for EjDHN3，responded to seed development. The expression levels of EjDHN2 and EjDHN5 were relatively high in pulp and responsed to pulp development. In leaves during seasonal changes，the expression pattern of different EjDHN members was rather similar，with the highest transcript levels reached in winter，whereas the expression were also strong in early summer for EjDHN1，EjDHN2，EjDHN4 and EjDHN5. Under drought stress，the transcript levels of all seven genes increased in leaves，with EjDHN6 most greatly increased. Moreover，expression of all these genes responded differently，with EjDHN6 most sensitive，to ABA treatment.

Key words: loquat, dehydrin, gene expression, fruit developmental stage, seasonal changes, drought stress, ABA