Effect of high night temperature and CO2 on yield and seed quality of summer green gram (Vigna radiata) under soil plant atmospheric research (SPAR)

An experiment was designed in Coimbatore, Tamil Nadu during two successive summer seasons, 2021 and 2022, to investigate the effects of high night temperature (HNT) (ambient+3oC) CO2 (600ppm) on yield seed quality parameters green gram under ten treatments SPAR (Soil Plant Atmospheric Research) ambient conditions. The objective this research i) quantify short-term HNT contribution factors (ii) employing biochemical analysis. Green were significantly reduced when compared condition. Pooled data from seasons revealed that stress imposed (i) 43 49 DAS (Day After Sowing), number flowers dropped per plant increased by 41.3% 29 35 DAS, pod setting percentage decreased 18.5% (iii) 36 42 grain biomass/plant 26.9 % 29.3%respectively. In aspects parameters, Seed protein 20.5% 50 56 DAS. Total sugars, polyphenols, calcium iron 17.7, 19.9, 19.9 37.3%, respectively moisture 19.7% 57 63 (iv) levels proline phytic acid 64.3 33.8%, respectively, Overall, adversely affected three (flower initiation stage filling stage) such as protein, total moisture, proline, acid, 50% flowering development (42 DAS).