Characterization of a genomic region that maintains chlorophyll and nitrogen contents during ripening in a high-yielding stay-green rice cultivar

Yamamoto, Tetsuro; Suzuki, Tadafumi; Suzuki, Kenji; Adachi, Shunsuke; Sun, Jian; Yano, Masahiro; Ookawa, Taiichiro; Hirasawa, Tadashi

doi:10.1016/j.fcr.2017.03.001

Cited by 25 publications

(11 citation statements)

References 38 publications

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“…Phytohormones, especially cytokinin, have been implicated in the mediated stay‐green trait in some species. Several QTLs related to leaf chlorophyll content, nitrogen content and nitrogen transport during ripening were detected in analyses of RILs derived from a cross between Akenohoshi ( indica × japonica ) and Koshihikari ( japonica ) (Yamamoto et al., ). One of the chlorophyll content reduction QTLs, qCHR1 , was narrowed down to a 7.7‐Mb region on the short arm of chromosome 3, close to one of the regions identified in our GWAS.…”

Section: Discussionmentioning

confidence: 99%

Identification of natural variants affecting chlorophyll content dynamics during rice seedling development

et al. 2018

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Seedling vigour is an important characteristic in relation to crop growth and yield. Traits such as photosynthetic capacity and chlorophyll content contribute significantly to seedling establishment at the early growth stage in various crop species, including rice. A diverse panel of 227 rice varieties from several countries was evaluated to determine chlorophyll contents at multiple time points during the seedling stage using a soil-plant analysis development (SPAD) meter, a non-destructive portable device. Using new statistical approaches, several chromosomal regions associated with variations in chlorophyll content in the third leaf at 13, 16 and 19 days after imbibition were detected. A single nucleotide polymorphism (SNP) cluster on the end of chromosome 11 was significantly associated with the onset of leaf senescence. This region was enriched with genes related to cell death and the stress response. We have identified rice germplasm showing delayed-senescence phenotypes, these could be suitable donors and genetic resources for breeding, and the use of significant SNP markers associated with these traits could enhance the efficiency of their selection in breeding programmes. K E Y W O R D S chlorophyll content, genomewide association study, onset of leaf senescence, quantitative trait loci, seedling vigour, stay-green 1 | BACKGROUND Photosynthesis converts CO 2 to energy and provides the carbon source to support plant growth and development. Changes in the photosynthetic capacity and efficiency of plants can reflect their internal responses to stresses and the natural ageing process. Many biological factors contribute to photosynthetic performance. One of those factors, chlorophyll content, is directly involved in plant growth and yield production, and is controlled by quantitative trait loci

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Section: Discussionmentioning

confidence: 99%

Identification of natural variants affecting chlorophyll content dynamics during rice seedling development

et al. 2018

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“…Positive correlations have been found between grain yield and N accumulation after heading, suggesting that increasing N accumulation after heading is crucial to increase grain yields 11 . Meanwhile, the accumulation of N in upper leaves after anthesis is also vital for maintaining the stay-green state of rice leaves 12 . Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) in leaves accumulates to a level in excess of photosynthetic requirements, and serves as a store of N for grain filling 13 .…”

Section: Introductionmentioning

confidence: 99%

Effects of Post-Anthesis Nitrogen Uptake and Translocation on Photosynthetic Production and Rice Yield

Xiang

Zhang

et al. 2018

Sci Rep

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Post-anthesis nitrogen uptake and translocation play critical roles in photosynthetic assimilation and grain filling. However, their effects on leaf stay-green characteristics, dry matter accumulation, and translocation after anthesis remain unclear. In this study, post-anthesis N uptake and translocation between two different rice genotypes (Yongyou12 and Zhongzheyou1) were compared through soil nitrogen leaching treatments at the meiosis stage (MST) and anthesis stage(AST) respectively, and their effects on leaf stay-green duration, photosynthesis, dry matter accumulation and translocation during ripening and yield formation were estimated. The results showed that the soil nitrate-N and ammonium-N contents in Yongyou12 pots decreased significantly, and post-anthesis N uptake was 2.0–3.4 fold higher in Yongyou12 than in Zhongzheyou1. The activities of N-metabolism enzymes and antioxidant enzymes were higher, and flag-leaf photosynthesis and dry matter accumulation during ripening were greater, in Yongyou12 than in Zhongzheyou1. However, insufficient available soil N led to significant decreases in the activities of N- metabolism enzymes, decreased flag-leaf photosynthesis, increased translocation of dry matter and N pre-anthesis, accelerated leaf senescence, shorter duration of the leaf stay-green period, and decreased dry matter accumulation and grain plumpness. In addition, the effect of N uptake after anthesis on yield is greater for rice genotypes that depend on post-anthesis dry matter accumulation and an expanded sink capacity.

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“…In addition, ESCA could enhance photosynthesis by increasing the chlorophyll content so as to increase maize yield. Nitrogen is an important component of chlorophyll, and the improvement in nitrogen content is beneficial to the synthesis of chlorophyll . The free amino groups of the natural polysaccharide polymer could promote the synthesis of chlorophyll.…”

Section: Resultsmentioning

confidence: 99%

Preparation and mechanism analysis of an environment‐friendly maize seed coating agent

Zeng

Zhao

et al. 2017

J Sci Food Agric

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Characterization of a genomic region that maintains chlorophyll and nitrogen contents during ripening in a high-yielding stay-green rice cultivar

Cited by 25 publications

References 38 publications

Identification of natural variants affecting chlorophyll content dynamics during rice seedling development

Identification of natural variants affecting chlorophyll content dynamics during rice seedling development

Effects of Post-Anthesis Nitrogen Uptake and Translocation on Photosynthetic Production and Rice Yield

Preparation and mechanism analysis of an environment‐friendly maize seed coating agent

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