Photosynthetic performance and photosynthesis-related gene expression coordinated in a shade-tolerant species Panax notoginseng under nitrogen regimes.

ABSTRACT:

Background

Nitrogen (N) is an essential component of photosynthetic apparatus. However, the mechanism that photosynthetic capacity is suppressed by N is not completely understood. Photosynthetic capacity and photosynthesis-related genes were comparatively analyzed in a shade-tolerant species Panax notoginseng grown under the levels of low N (LN), moderate N (MN) and high N (HN).

Results

Photosynthetic assimilation was significantly suppressed in the LN- and HN-grown plants. Compared with the MN-grown plants, the HN-grown plants showed thicker anatomic structure and larger chloroplast accompanied with decreased ratio of mesophyll conductance (g_m) to Rubisco content (g_m/Rubisco) and lower Rubisco activity. Meanwhile, LN-grown plants displayed smaller chlo

SUBMITTER: Zhang JY 

PROVIDER: S-EPMC7321538 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature