2019年11月2日 · A method that effectively increases floret number per spikelet in rice could potentially improve grain yield and production levels. Here, we summarise two novel approaches for breeding rice cultivars with a multifloret spikelet, thereby increasing floret/spikelet/grain number per panicle and rice yield.

2018年7月1日 · Taking rice as an example, the paper reviewed the physiological mechanism underlying spikelet degeneration, with focus on the roles of phytohormones in regulating the process. There are several hypotheses for the spikelet degeneration, such as resource limitation, self-organization, and primigenic dominance.

2019年12月31日 · In rice, the spikelet contains one fertile terminal floret, one pair of sterile lemmas, and one pair of rudimentary glumes. Although wild-type rice produces just a single floret per spikelet, the loss of determinacy of spikelet meristems or restoring the two “lateral florets”, which now are considered to be antecedents of “sterile lemmas ...

2005年1月15日 · In this review, we first describe the phasic development of the rice plant, and then describe in detail the developmental courses of major organs, leaf, root and spikelet, and specific organs/tissues.

First, it is helpful to describe the structure of rice spikelets and florets, which have unique morphologies distinct from those of eudicot flowers. The spikelet is the structural unit of...

2021年8月9日 · This study offers new insights into the mechanisms underlying spikelet differentiation and degeneration in rice varieties differing in panicle sizes and provides a theoretical and practical basis for promoting high-yielding rice cultivation and breeding, stabilizing rice production, and ensuring world food security.

2021年6月1日 · The spikelet, comprising a pair of bracts and one or multiple florets, is a grass-specific primary inflorescence unit. The number of florets in a spikelet varies with the species of grass. In rice, one spikelet harbors a fertile floret and a pair of sterile lemmas (also known as ‘empty glumes’) [56]. Wild-type rice produces only one grain ...

2024年10月1日 · Rice yield is heavily reliant on the number of spikelets per panicle, a factor determined by the processes of spikelet differentiation and degeneration. In rice cultivars with large panicles, spikelet degeneration negates the advantage of large panicle and constrains the potential for rice yield.

Thus, detailed description of rice inflorescence and spikelet development would be valuable for characterizing mutant phenotypes and also for comparing rice with other grass species. In this study, we showed a number of landmark events in the developmental courses of inflorescence and spikelet, and divided their development into nine and eight ...

1 天前 · The spikelet, a unique inflorescence unit of grasses such as rice (Oryza sativa), possesses developmental regulatory mechanisms that require further exploration.In this study, we identified a mutant named lateral floret2 (lf2), which exhibited abnormalities in spikelet development.The lf2 mutants produced lateral florets within the axils of sterile lemmas and/or lateral spikelets within the ...