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Variations in photosynthesis associated traits and grain yield of minor millets

Variations in photosynthesis associated traits and grain yield of minor millets Photosynthesis is one of the important processes, and understanding its variability can be one of the approaches to improve crop productivity. It is presumed that most of the minor millets have C4 type of photosynthetic carbon fixation. However, research on quantifying the variability in photosynthesis associated traits in minor millets is limited. Objectives of this study were to (1) quantify the variation in leaf anatomical, physiological and yield traits among the minor millets and (2) to assess whether photosynthesis associated traits had a relationship with grain yield in minor millet. The result indicated that finger millet, little millet, barnyard millet, proso millet, foxtail millet and kodo millet had C4 leaf anatomy, and among them, finger millet had an increased vascular bundle and bundle sheath cell size. Among the minor millets, at ambient light, temperature and CO2 levels, the photosynthetic rate, stomatal conductance, intrinsic water use efficiency, number of major and minor veins, and grain yield were higher in foxtail millet. The CO2 response curve indicates that proso millet had a higher photosynthetic rate at higher concentrations of CO2 than other minor millets. However, the light response curve suggests that foxtail millet had a higher photosynthetic rate at higher light intensity levels. Among the minor millets studied, there was no relationship between mean photosynthesis associated traits over different growth stages with grain yield. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Physiology Reports Springer Journals

Variations in photosynthesis associated traits and grain yield of minor millets

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References (19)

Publisher
Springer Journals
Copyright
Copyright © Indian Society for Plant Physiology 2020
ISSN
2662-253X
eISSN
2662-2548
DOI
10.1007/s40502-020-00525-5
Publisher site
See Article on Publisher Site

Abstract

Photosynthesis is one of the important processes, and understanding its variability can be one of the approaches to improve crop productivity. It is presumed that most of the minor millets have C4 type of photosynthetic carbon fixation. However, research on quantifying the variability in photosynthesis associated traits in minor millets is limited. Objectives of this study were to (1) quantify the variation in leaf anatomical, physiological and yield traits among the minor millets and (2) to assess whether photosynthesis associated traits had a relationship with grain yield in minor millet. The result indicated that finger millet, little millet, barnyard millet, proso millet, foxtail millet and kodo millet had C4 leaf anatomy, and among them, finger millet had an increased vascular bundle and bundle sheath cell size. Among the minor millets, at ambient light, temperature and CO2 levels, the photosynthetic rate, stomatal conductance, intrinsic water use efficiency, number of major and minor veins, and grain yield were higher in foxtail millet. The CO2 response curve indicates that proso millet had a higher photosynthetic rate at higher concentrations of CO2 than other minor millets. However, the light response curve suggests that foxtail millet had a higher photosynthetic rate at higher light intensity levels. Among the minor millets studied, there was no relationship between mean photosynthesis associated traits over different growth stages with grain yield.

Journal

Plant Physiology Reports – Springer Journals

Published: Sep 18, 2020

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