The photosynthetic and structural differences between leaves and siliques of Brassica napus exposed to potassium deficiency.

ABSTRACT:

Background

Most studies of photosynthesis in chlorenchymas under potassium (K) deficiency focus exclusively on leaves; however, little information is available on the physiological role of K on reproductive structures, which play a critical role in plant carbon gain. Brassica napus L., a natural organ-succession species, was used to compare the morphological, anatomical and photo-physiological differences between leaves and siliques exposed to K-deficiency.

Results

Compared to leaves, siliques displayed considerably lower CO₂ assimilation rates (A) under K-deficient (-K) or sufficient conditions (+K), limited by decreased stomatal conductance (g _s), apparent quantum yield (α) and carboxylation efficiency (CE), as well as the ratio of the maximum rate of

SUBMITTER: Lu Z 

PROVIDER: S-EPMC5725657 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature