Effects ofLow Light onAgronomic and Physiological Characteristicsof RiceIncludingGrain Yield and Quality
Author(s): LIUQi-hua, WUXiu, CHENBo-cong, MAJia-qing, GAOJie
Pages: 243-251
Year: 2014 Issue: 5
Journal: Rice Science
Keyword: grain quality; grainyield; physiological characteristic; rice; lowlight; agronomic characteristic;
Abstract: Light intensity is one of the most important environmental factorsthat determinethe basic characteristics ofrice development. However, continuouslycloudyweatheror rainfall, especiallyduring thegrain-filling stage,inducesasignificantlossin yieldandresultsinpoor grainquality.Stress caused by lowlightoftencreatessevere meteorological disastersinsomerice-growing regionsworldwide.This reviewwas basedon our previousresearchandrelated researchregardingthe effectsoflowlightonrice growth, yield and qualityas well asthe formation of grain, andmainlyreviewedthephysiological metabolism of rice plants, includingcharacteristics ofphotosynthesis, activities of antioxidant enzymes in riceleaves and key enzymes involved in starch synthesis in grains,as well asthetranslocationsof carbohydrate and nitrogen. Thesecharacteristics includevariousgrain yieldand rice qualitycomponents (millingandappearanceas well ascooking, eatingand nutritional qualities) underdifferentrates of shading imposedatthevegetative or reproductive stagesof rice plants. Furthermore, we discussedwhy grain yield and qualityare reducedunderthelowlightenvironment. Next, wesummarizedthe need for future researchthat emphasizesmethods caneffectively improverice grain yield and quality underlow light stress.These research findings can provideabeneficial reference forricecultivation management and breedingprograminlowlightenvironments.
Pages: 243-251
Year: 2014 Issue: 5
Journal: Rice Science
Keyword: grain quality; grainyield; physiological characteristic; rice; lowlight; agronomic characteristic;
Abstract: Light intensity is one of the most important environmental factorsthat determinethe basic characteristics ofrice development. However, continuouslycloudyweatheror rainfall, especiallyduring thegrain-filling stage,inducesasignificantlossin yieldandresultsinpoor grainquality.Stress caused by lowlightoftencreatessevere meteorological disastersinsomerice-growing regionsworldwide.This reviewwas basedon our previousresearchandrelated researchregardingthe effectsoflowlightonrice growth, yield and qualityas well asthe formation of grain, andmainlyreviewedthephysiological metabolism of rice plants, includingcharacteristics ofphotosynthesis, activities of antioxidant enzymes in riceleaves and key enzymes involved in starch synthesis in grains,as well asthetranslocationsof carbohydrate and nitrogen. Thesecharacteristics includevariousgrain yieldand rice qualitycomponents (millingandappearanceas well ascooking, eatingand nutritional qualities) underdifferentrates of shading imposedatthevegetative or reproductive stagesof rice plants. Furthermore, we discussedwhy grain yield and qualityare reducedunderthelowlightenvironment. Next, wesummarizedthe need for future researchthat emphasizesmethods caneffectively improverice grain yield and quality underlow light stress.These research findings can provideabeneficial reference forricecultivation management and breedingprograminlowlightenvironments.
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