Photosynthetica 2023, 61(2):203-214 | DOI: 10.32615/ps.2022.048

Intraspecific variation in photosynthetic efficiency in soybean (Glycine max L.) varieties towards solar ultraviolet radiations

S.S. BARONIYA1, K. JUMRANI2, M. BARONIYA1, K.N. GURUPRASAD3, M. LANDI4, S. KATARIA5
1 SwaTukojirao Pawar Shaskiya Vigyan Mahavidyalaya, Dewas (M.P.), India
2 Division of Plant Physiology, Indian Institute of Soybean Research, Indore (M.P.), India
3 Sri Vaishnav Vidyapeeth Vishwavidyalaya, Indore (M.P.), India
4 Department of Agriculture, Food and Environment, University of Pisa, 56124 Pisa, Italy
5 School of Biochemistry, Devi Ahilya Vishwavidyalaya, Indore (M.P.), India

In the current study, we used four soybean varieties PK-1029, PK-472, NRC-7, and Hardee to examine the effect of exclusion of solar UV radiation on photosynthetic efficiency and to test possible variety-dependent sensitivity to ambient UV (280-400 nm). Plants that were grown under UV exclusion filters had higher chlorophyll a and b, efficiencies of PSII and more active reaction centers indicated that PSII were substantially affected by solar UV radiation. The significant increase in net photosynthesis was linked to increased stomatal conductance and lower intercellular concentration of CO2 in UV-excluded plants. The exclusion of solar UV increased seed mass per plant in all soybean varieties as compared to the control; this indicates that ambient UV exclusions boost photosynthetic efficiency and improve soybean yield. The overall cumulative stress response index of four varieties implies that Hardee and PK-472 were more sensitive whereas NRC-7 and PK-1029 were resistant to ambient UV radiations.

Additional key words: chlorophyll fluorescence; OJIP transient; photosynthesis; PSII efficiency; soybean; UV exclusion.

Received: September 16, 2022; Revised: September 16, 2022; Accepted: November 14, 2022; Prepublished online: December 21, 2022; Published: June 6, 2023  Show citation

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BARONIYA, S.S., JUMRANI, K., BARONIYA, M., GURUPRASAD, K.N., LANDI, M., & KATARIA, S. (2023). Intraspecific variation in photosynthetic efficiency in soybean (Glycine max L.) varieties towards solar ultraviolet radiations. Photosynthetica, 61(SPECIAL ISSUE 2023/1), 203-214. doi: 10.32615/ps.2022.048
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