Abstract：
:Light-induced chloroplast movements control efficient light utilization in leaves, and thus, are essential for leaf photosynthesis and biomass production under fluctuating light conditions. Chloroplast movements have been intensively analyzed using wild-type and mutant plants of Arabidopsis thaliana. The molecular mechanism and the contribution to biomass production were elucidated. However, the knowledge of chloroplast movements is very scarce in other plant species, especially grass species including crop plants. Because chloroplast movements are efficient strategy to optimize light capture in leaves and thus promote leaf photosynthesis and biomass, analysis of chloroplast movements in crops is required for biomass production. Here, we analyzed chloroplast movements in a wide range of cultivated and wild species of genus Oryza. All examined Oryza species showed the blue-light-induced chloroplast movements. However, O. sativa and its ancestral species O. rufipogon, both of which are AA-genome species and usually grown in open condition where plants are exposed to full sunlight, showed the much weaker chloroplast movements than Oryza species that are usually grown under shade or semi-shade conditions, including O. officinalis, O. eichingeri, and O. granulata. Further detailed analyses of different O. officinalis accessions, including sun, semi-shade, and shade accessions, indicated that the difference in chloroplast movement strength between domesticated rice plants and wild species might result from the difference in habitat, and the shape of mesophyll chlorenchyma cells. The findings of this study provide useful information for optimizing Oryza growth conditions, and lay the groundwork for improving growth and yield in staple food crop Oryza sativa.
journal_name
J Plant Resjournal_title
Journal of plant researchauthors
Kihara M,Ushijima T,Yamagata Y,Tsuruda Y,Higa T,Abiko T,Kubo T,Wada M,Suetsugu N,Gotoh Edoi
10.1007/s10265-020-01189-wsubject
Has Abstractpub_date
2020-07-01 00:00:00pages
525-535issue
4eissn
0918-9440issn
1618-0860pii
10.1007/s10265-020-01189-wjournal_volume
133pub_type
杂志文章abstract：:Recent progress in the study of cytokinin metabolism in plants indicates that quantitative analysis of cytokinin nucleotides is essential for elucidation of early steps of the biosynthetic pathway. However, traditional procedures for purification and quantification of cytokinin cannot discriminate the various nucleoti...
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