胀果甘草开花物候和结实特性研究OACHSSCD

In order to set the foundation of protecting the wild resources and fine variety breeding,in this study,phenology and fruit-ing characteristics of Glycyrrhiza inflata were studied.Regulations and records of flower morphological characteristics,individual flowering,population flowering phenology,pollen viability,stigma receptivity and seed setting characteristics were performed through statistics and observation during the process of flowering and fruiting periods of G.inflata.The raceme of G.inflata is axillary,each inflorescence is composed of 20-30 flowers.From early May to early to mid-June,single flower opened corolla around 12:00-17:00 including four stage,including corolla closure stage,vexilla expansion stage,wing expansion stage and full corolla expansion stage;the flowering duration of a single flower was 2.6-3.8 days,the flowering duration of a single inflorescence was 15-28 days,popula-tion flowering period was 30-47 days,and the population flowering period was categorized into 3 stages,which are initial blooming stage,full blooming stage and final blooming stage.Pollen viability and stigma receptivity of a single flower exhibited a consistent pattern of initial increase followed by decrease across the four floral developmental stages.In the three plots,15.0%-30.3%of keel petals opened slightly,and most of keel petals were closed.The average number of seeds per fruit suddenly decreased from the initial stage of ovary enlargement to young fruit stage.Both the flowering duration of single flowers and the population flowering period were relatively long,and the mating system was predominantly facultative outcrossing,fruit setting rate was much lower and the number of seeds in per fruit was very few.This study will provide an important theoretical basis for the propagation,conservation and breeding of G.inflata in the fields.