Data assessing genotypic variations in selected traditional rice landraces of Jeypore tract of Odisha, India based on photosynthetic traits

Debabrata Panda,Tanmayee Sahu,Jijnasa Barik,Swati S Mishra,Bandana Padhan,Sangram K Lenka

doi:10.1016/j.dib.2019.104305

Abstract

Variations in photosynthetic characteristics and dry matter accumulation were investigated in thirty selected rice (Oryza sativa L.) landraces from Jeypore tract of Odisha, India to find the possibility of their use in crop improvement programs. Leaf gas exchange measurements, photosystem (PS) II activity and leaf pigment estimates were conducted at the flowering stage. Significant differences were noticed in the CO2 photosynthetic rate (PN), stomatal conductance (gs), transpiration rate (E), internal CO2 concentration (Ci), water use efficiency (WUE) and carboxylation efficiency (CE) among the landraces. In addition, significant variation was observed in leaf chlorophyll content, PS II activity and dry matter accumulation (DMA). Further, multiple correlations between photosynthetic characteristics and other physiological traits revealed that leaf photosynthesis was not significantly influenced by PS II photochemical activity, leaf area and pigment contents but it was regulated by stomatal conductance, water use efficiency and carboxylation efficiency. Taken together, data presented here shows that some of the landraces had superior photosynthetic traits along with better DMA under prevailing environmental condition and can be used for future crop improvement programs aimed for an increase of leaf photosynthesis in rice.

Highlights

Data assessing genotypic variations in selected traditional rice landraces of Jeypore tract of Odisha, India based on photosynthetic traits
Variations in photosynthetic characteristics and dry matter accumulation were investigated in thirty selected rice (Oryza sativa L.) landraces from Jeypore tract of Odisha, India to find the possibility of their use in crop improvement programs
Significant differences were noticed in the CO2 photosynthetic rate (PN), stomatal conductance, transpiration rate (E), internal CO2 concentration (Ci), water use efficiency (WUE) and carboxylation efficiency (CE) among the landraces

Summary

Plant material and growth condition

The study was conducted by taking thirty selected traditional rice landraces from Jeypore tract of Odisha, India. All the landraces were sown directly in earthen pots (30 cm in diameter) containing two kg of farm soil and farmyard manure (3:1) in the campus of Central University of Orissa, Koraput, India (82 44ʹ 54ʹ E to 18 46ʹ47ʹ N, 880 m above the mean sea level and average rain fall of 1500 mm). PN: photosynthetic rate [mmol (CO2) mÀ2 sÀ1]; E: transpiration rate [mmol (H2O) mÀ2 sÀ1]; gs: stomatal conductance [mmol (H2O) mÀ2 sÀ1]; Ci: internal CO2 concentration (mmol molÀ1); WUE: water use efficiency (PN/E); CE: carboxylation efficiency (PN/Ci); Chl: chlorophyll [mg gÀ1 Fm]; CAR: carotenoid [mg gÀ1 Fm]; LA: leaf area (cm2); DMA: dry matter accumulation (%).CV: coefficient of variance. All the measurements were performed three times during flowering stage

Measurement of leaf gas exchange and chlorophyll fluorescence

Findings

Statistical analysis