Pecan is the only native north American tree nut.The USA produces approximately 80%of the world’s pecans.Pecan trees have an extended juvenility,10 years to the first nut crop.With mature bearing they begin alternate...Pecan is the only native north American tree nut.The USA produces approximately 80%of the world’s pecans.Pecan trees have an extended juvenility,10 years to the first nut crop.With mature bearing they begin alternate bearing;alternating large and small crops.Theoretically,a heavy crop inhibits flower induction in the current year resulting in a low crop the following year.The flowering of perennial trees involves a complex interplay of multiple hormones.The possible molecular mechanisms regulating tree flowering can be revealed by endogenous plant hormone quantification,exogenous hormone application and RNA-sequencing.In this review,we synthesize the investigations of transcriptomic analysis and exogenous hormone treatments on bud break and flowering in fruit/nut trees with a focus on pecan.Knowledge of how hormones regulate flowering suggest they are a potential tool for improving return bloom and mitigating alternate bearing.展开更多
基金supported by Oklahoma Department of Agriculture,Food,&Forestry Specialty Crop Grant Program and Oklahoma Pecan Growers’Association.
文摘Pecan is the only native north American tree nut.The USA produces approximately 80%of the world’s pecans.Pecan trees have an extended juvenility,10 years to the first nut crop.With mature bearing they begin alternate bearing;alternating large and small crops.Theoretically,a heavy crop inhibits flower induction in the current year resulting in a low crop the following year.The flowering of perennial trees involves a complex interplay of multiple hormones.The possible molecular mechanisms regulating tree flowering can be revealed by endogenous plant hormone quantification,exogenous hormone application and RNA-sequencing.In this review,we synthesize the investigations of transcriptomic analysis and exogenous hormone treatments on bud break and flowering in fruit/nut trees with a focus on pecan.Knowledge of how hormones regulate flowering suggest they are a potential tool for improving return bloom and mitigating alternate bearing.
