Research progress of phloem unloading in horticultural plants
Phloem unloading contains a series of complex processes.Phloem unloading plays an important role in the transportation and distribution of assimilates in horticultural plants(fruit trees,vegetables,ornamental plants).This study summarizes the main ways of phloem unloading,and focuses on the main research results of phloem unloading in the growth and development of horticultural plants,including:(1)the main sugar substances transported by phloem;(2)phloem unloading mode;(3)research approaches for phloem unloading;(4)research on phloem unloading in horticultural plants.The key enzymes and sucrose transporters involved in phloem unloading process need further clarification with in-depth research combining the emergence of new technologies,which will help to further elucidate the underlying molecular regulation mechanism of phloem unloading during the key economic and ornamental traits formation in horticultural plants,as well as to provide new ideas for detail research on phloem unloading in other plants.[Ch,1 fig.1 tab.75 ref.]
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