Root-function Spatial Division in Sweetpotato Source-sink Relationship:Evolution and Application
Sweetpotato root-function spatial division(RFSD)technology is a novel cultivation technique which separates nutrient-absorbing roots from storage roots in space and function.This technology allows for the observation of tuber development without affecting plant growth and enables the study of photosynthetic transport efficiency within the same genetic background.RFSD is a key technique for studying the source-sink relationship in sweetpotato and cultivating overhead-sweetpotato.To further explore the application of RFSD technology in the study of source-sink relationships in sweetpotato,we specifically carried out this review.The paper summarizes the impact of"source","flow",and"sink"on sweetpotato yield,reveals the development process of sweetpotato RFSD technology,analyzes the principles,evolution,characteristics,and advantages of various RFSD technologies currently developed,and discusses the application of root system functional separation technology in the study of source-sink relationship in sweetpotato and overhead-sweetpotato.Here we propose that RFSD technology can serve as a crucial tool for studying the interactions of"source","flow",and"sink"in sweetpotato,and be used to investigate source-sink relationship and ideotype within the same genetic background.It is necessary to improve and enhance the RFSD,so as to make it possible to achieve stable storage root in the air under the facility conditions.Further research and application of RFSD technology can provide theoretical and technical references for the breeding of new sweetpotato varieties,especially high photosynthetic efficiency,short-vine,and high-yielding cultivars.It can also offer technical support for facility cultivation and precise quality control.
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