Genotypic differences in pod wall and seed growth relate to invertase activities and assimilate transport pathways in asparagus bean.

ABSTRACT:

Background and aims

Coordination of sugar transport and metabolism between developing seeds and their enclosing fruit tissues is little understood. In this study the physiological mechanism is examined using two genotypes of asparagus bean (Vigna unguiculata ssp. sesquipedialis) differing in pod wall and seed growth rates. Pod growth dominates over seed growth in genotype 'Zhijiang 121' but not in 'Zhijiang 282' in which a 'bulging pod' phenotype is apparent from 8 d post-anthesis (dpa) onward.

Methods

Seed and pod wall growth rates and degree of pod-bulging were measured in the two genotypes together with assays of activities of sucrose-degrading enzymes and sugar content in pod wall and seed and evaluation of cellular pathways of phloem unloading in seed coat using a sympl

SUBMITTER: Liu YH 

PROVIDER: S-EPMC3359919 | biostudies-literature | 2012 Jun

REPOSITORIES: biostudies-literature