Suppression of leaf growth and photosynthetic capacity as an acclimation strategy to nitrogen deficiency in a nitrogen-sensitive and shade-tolerant plant Panax notoginseng. Issue 1 (31st December 2022)

• Record Type: Journal Article
• Authors: Cun, Zhu; Shuang, Sheng-Pu; Zhang, Jin-Yan; Hong, Jie; Wu, Hong-Min; Yang, Jing; Zhao, Hong-Chao; Gao, Li-Lin; Chen, Jun-Wen
• Is Part Of: Journal of plant interactions. Volume 17:Issue 1(2022)
• Page Start: 980
• Page End: 990
• Publication Date: 2022-12-31
• Subjects: Nitrogen deficiency -- photosynthetic nitrogen allocation -- photosynthesis -- Panax notoginseng; Plant ecophysiology -- Periodicals; Plants -- Periodicals; Toxins -- Periodicals; 581.7
• DOI: 10.1080/17429145.2022.2141902
• Languages: English
• ISSNs: 1742-9145

Abstract

ABSTRACT: Photosynthesis is susceptible in response to nitrogen (N) deficiency. However, the acclimation of shade-tolerant and high-N sensitive species to N deficiency is unclear. Leaf morpho-physiological traits, photosynthetic performance related parameters were examined in a shade-tolerant and high-N sensitive species P. notoginseng grown under different N levels. Lower N content and Chl content were recorded in the N0 -grown P. notoginseng . The maximum values of leaf morpho-physiological traits, photosynthetic rate, and photosynthetic N use efficiency (PNUE) were obtained in the N15 -grown P. notoginseng . Coefficients for leaf N allocation into the carboxylation and light-harvesting system components in the N0 -grown plants were significantly higher than others. N0 and N7.5 plants showed higher K phase. N addition decreased the absorption and capture of the light energy per unit area ( ABS/RC and TRO /RC ) and non-photochemical quenching (NPQ). Photochemical quenching (qP), electron transport rate (ETR), and effective quantum yield of photosystem II (ϕPSII ) were reduced in the N0 -grown plants. The reduction of light-harvesting and utilization capacity not only leads to a decrease in PNUE, but also induces the damage of PSII reaction center. Overall, the inhibition of leaf growth and photosynthetic capacity is an essential strategy for high-N sensitive and shade-tolerant plants in response to N deficiency.