Interactive effects of temperature and phosphorus nutrition on soybean: leaf photosynthesis, chlorophyll fluorescence, and nutrient efficiency

Abstract

An experiment was conducted to assess interactive effects of temperature (22, 26, 30, and 34°C daily mean T) and phosphorus (P) fertilization (sufficient, 0.5 mM, and deficient, 0.08 mM P) on soybean physiological traits. The P deficiency decreased leaf P concentration over approximately 50% across temperature regimes. However, a marked decrease in physiological traits under P deficiency was primarily observed below and at optimum temperature (26°C) but not at warmer temperatures. This resulted in a significant P × T interaction for parameters such as net photosynthetic rate (PN), stomatal conductance, quantum yield of PSII (ΦPSII), and SPAD value. A combination of photo-biochemical parameters (e.g., ΦPSII, carboxylation capacity, SPAD value), improved CO2 diffusion processes due to unaffected or reduced mesophyll or stomatal limitation, and higher tissue P utilization efficiency appeared to overcome limitations to PN imposed by P deficiency at warmer temperatures.

Exploration of chlorophyll fluorescence characteristics gene regulatory in rice (Oryza sativa L.): a genome-wide association study

“…(2013) identified no significant correlation. Notably, Singh et al. (2019) employed a second-order polynomial function to model the regression relationship between SPAD and .…”

“…In contrast, Fu et al (2013) identified no significant correlation. Notably, Singh et al (2019) employed a second-order polynomial function to model the regression relationship between SPAD and F II . These results suggested the presence of a complex nonlinear relationship between SPAD and F II across different materials and growth stages.…”

Straw mulching combined with phosphorus fertilization increased photosynthesis rate and grain yield of wheat due to reduced stomatal and mesophyll limitations

“…The g m displayed strong and consistent coordination with P n under both induction and steady‐state settings (Liu et al., 2022). This shows that porosity is reduced owing to P deficiency, which limits diffusion of CO 2 into the interstitial space, leading to a reduction in P n (Singh et al., 2019). The response of g s to stress occurs as fast or faster than that of g m (Alvarez et al., 2022; Li et al., 2022).…”

Variations in the light interception and associated physiological traits of cowpea and fodder sorghum grown under different Agroforestry system

“…The cowpea showed 9.21% increase in photosynthetic rate under Dalbergia sissoo based agroforestry system that received higher light whereas the fodder sorghum showed 14.28% increase over the Dalbergia sissoo indicating the light requirement for the fodder sorghum has not attained the peak may be because of fact that C 4 crops require more sunlight than C 3 crops (Li et al, 2021). Singh et al (2019) observed that with the advancement in height and crown expansion of trees, the shading effects on the crop had increased, which in turn affected the photosynthetic e ciency of the crop resulting in lower vegetative growth and lesser grain yield as compared to the sole crop.…”