Improving photosynthetic characteristics and antioxidant enzyme activity of capsule wall and subtending leaves increases cotton biomass under limited irrigation system

Abstract

Car-carotenoids; CAT-catalase; Chl a(b)-chlorophyll a(b); BLS-boll-leaf system; ETR-apparent electron transfer rate; ETRII-electron transfer rate of PSII; F0-the initial minimal fluorescence; FB3-the 3 rd fruiting branch; Fm-maximum fluorescence; Fm'-the maximum fluorescence yield under light adaptation; Ft-the actual fluorescence yield, Fv/Fm-maximum quantum yield of PSII; MC-mepiquat chloride; MDA-malondialdehyde; NPQ-nonphotochemical quenching; POD-peroxidase; qp-photochemical quenching coefficient; SE-standard error; SOD-superoxide dismutase; TAA-day interval after anthesis; YIIquantum efficiency of PSII.

Improving nitrogen content in the carboxylation and electron transfer component can boost the reproductive biomass of filmless cotton in arid areas

“…Water is the raw material for photosynthesis and affects the photosynthetic area, LMA, and Chl content. Prior research has demonstrated that the Car content increases with decreasing irrigation amount, while Chl a and Chl b increase with increasing irrigation amount (N. N. Li et al., 2021). The Chl and Car contents in this experiment tended to decrease with increasing irrigation amount, which may be due to the short‐term drought stress experienced by the cotton plants between the two irrigation periods.…”

“…The D values for wavelengths 470, 645, and 663 nm were D 470 , D 645 , and D 663 , respectively, and the amount of photosynthetic pigment was C (mg dm −2 ). FV was the area of a disc (dm 2 ), and Vt was the total volume of the extracted solution (N. N. Li et al., 2021).…”

Overexpression of PagSTOMAGEN, a Positive Regulator of Stomatal Density, Promotes Vegetative Growth in Poplar

“…These results clearly show that increased stomatal density enhanced photosynthetic capacity but had no effects on WUE in STO-OE poplar. At the same time, studies have shown that an increase in CAT and POD enzyme activities can promote biomass accumulation [ 4 ]. CAT and POD enzyme activities were significantly increased in PagSTOMAGEN -overexpressing poplar compared with the WT ( Figure 6 A,B), which may also explain the vegetative growth advantage in STO-OE poplar.…”

“…Stomata, composed of a pair of guard cells, are channels on the surface of plant leaves [ 1 , 2 ] which regulate gas exchange between plants and the atmosphere and play an important role in maintaining plant photosynthesis and water-use efficiency [ 3 , 4 , 5 , 6 ]. The formation of mature stomata undergoes several intermediate steps, termed the stomatal lineage, from meristematic cells (MMC) to stomatal lineage ground cells (SLGC), guard cell mother cells (GMC), and finally, the formation of guard cells (GC) [ 7 , 8 , 9 ].…”