scholarly journals Studies on the Effects of Oxygen Concentration on the Photosynthesis and the Growth of Crop Plants : I. The effects of oxygen concentration under various growth temperatures on the growth of wheat and rice plants

1974 ◽  
Vol 43 (2) ◽  
pp. 267-277 ◽  
Author(s):  
Masataka FUKUYAMA ◽  
Tomoshiro TAKEDA ◽  
Tetsuro TANIYAMA
Keyword(s):  
Oxygen Concentration ◽  
Crop Plants ◽  
Rice Plants

scholarly journals Studies on Nitrogen Metabolism in Crop Plants : VIII. Occurrence of kinetin-like factor in root exudate of rice plants

1970 ◽  
Vol 39 (3) ◽  
pp. 363-369 ◽  
Author(s):  
Ryuzi YOSHIDA ◽  
Takashi ORITANI ◽  
Arasuke NISHI
Keyword(s):  
Nitrogen Metabolism ◽  
Root Exudate ◽  
Crop Plants ◽  
Rice Plants

scholarly journals β-Sitosterol differentially regulates key metabolites for growth improvement and stress tolerance in rice plants during prolonged UV-B stress

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Raheel Shahzad ◽  
Mohamed Ewas ◽  
Putri Widyanti Harlina ◽  
Shahid Ullah Khan ◽  
Pan Zhenyuan ◽  
...  
Keyword(s):  
Stress Tolerance ◽  
Plant Biomass ◽  
Crop Plants ◽  
Ultraviolet B ◽  
Rice Varieties ◽  
Chlorophyll Pigments ◽  
Rice Plants ◽  
Global Challenge ◽  
Whole Plant

Abstract Background Elevated ultraviolet-B (UV-B) radiation is potentially deleterious to many organisms specifically crop plants and has become a global challenge. Rice is an exceptionally important staple food which is grown worldwide, and many efforts have been done recently to improve rice varieties against UV-B stress. This current study aims to investigate the effects of exogenous application of β-sitosterol (βSito) on growth improvement and tolerance level of rice plants against prolonged UV-B stress. The physiological and metabolic responses were evaluated in rice plants not supplemented with βSito (Nβ) and those supplemented with βSito (Sβ). Results The Nβ and Sβ plants were grown under non-stress (ns) and under prolonged UV-B stress (uvs) conditions and termed as Nβns, Sβns and Nβuvs, Sβuvs, respectively. The application of βSito contributes positively under non-stress and specifically to UV-B stress in terms of improving numerous physiological parameters associated with growth and development such as shoot and root length, RWC, whole plant biomass, chlorophyll pigments, and photosynthetic-related parameters (Pn, Gs, Tr, WUEi, Fv/Fm, and NPQ) in Sβ compared with Nβ plants. Moreover, enhanced oxidative stress tolerance of Sβuvs vs. Nβuvs plants under stress was attributed to low levels of ROS and substantial trigger in activities of antioxidant enzymes (SOD, POD, CAT, and APX). Metabolic analysis was performed using GC-TOFMS, which revealed higher accumulation of several key metabolites including organic acids, sugars, amino acids, and others in Sβuvs vs. Nβuvs plants, which were mainly reduced in Nβ plants under stress vs. non-stress conditions. Conclusion These results provide useful data regarding the important role of βSito on growth maintenance and modulation of several metabolites associated with osmotic and redox adjustments during UV-B stress tolerance in rice plants. Importantly, βSito-regulated plasticity could further be explored specifically in relation to different environmental stresses in other economically useful crop plants.

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