根系功能分离技术在甘薯源库关系研究中的演进及其应用

Root-function Spatial Division in Sweetpotato Source-sink Relationship:Evolution and Application

甘薯根系功能分离技术(RFSD)是通过特殊栽培模式使甘薯养分吸收根和贮藏根在空间和功能上发生分离的一种新型栽培技术。通过此技术不仅可实现在不影响植株生长的情况下观测块根发育,还可在同一遗传背景下开展光合运输效率研究,是开展甘薯源库关系研究和培育空中甘薯的关键技术。本文归纳了“源”“流”“库”对甘薯产量的影响,回顾了甘薯RFSD的发展历程,总结了目前发展的几种RFSD的原理、演进过程、特点及优长,分析了RFSD在甘薯源库关系和空中甘薯研究中的应用。提出RFSD可作为研究甘薯“源”“流”“库”互作关系的重要手段,今后可利用其优势,在同一遗传背景下开展源库关系和理想株型研究;改进和完善RFSD系统,为设施条件下实现空气中稳定结薯创造可能。RFSD的进一步研究和应用,可为甘薯新品种特别是高光效短蔓高产品种选育提供理论和技术参考,为设施栽培及品质精细调控提供技术支撑。

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.