Morphogenetic Alterations of Rice Floral Organs as affected by Spray of Chemical Hybridizing Agent HGR-626

Japanese Journal of Crop Science

Hitoshi SAKA¹  Yoji TAKEOKA¹  Masaaki ITO¹  Saburo YAMAMURA¹ 

关键词: Chemical hybridizing agent;    イネ;    HGR-626;    Morphogenesis;    化学交雑剤;    Pistil hyperplasia;    形態形成;    Rice;    雌ずい増生;    SEM;    小穂;    Sex initiation;    性発現;    spikelet;    走査電子顕微鏡;   

DOI  :  10.1626/jcs.59.528

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Morphogenetic alterations of rice spikelets grown under the influence of applied chemical hybridizing agent HGR-626 was studied using SEM and stereo microscope. Either a 10 ppm or 50 ppm solution of HGR 626 was sprayed at the spikelet primordium differentiation stage (Stage I), and in the middle of the meiosis stage (Stage II), respectively. Spikelets treated at Stage I showed such changes as: (1) spikelet and its component organs became smaller than control, (2) anthers of which bended toward axis, (3) no pollen mother cell differentiated in them, or (4) microspores with anther tissues ceased to develop, and, (5) exine of microspores developed irregularly to interconnect each other. Almost no content accumulated in them. On the contrary, 56.4% of pistils investigated in this study proliferated their ovaries and/or stigmata. Change of sex initiation namely pistil hyperplasia and stamen hypoplasia in rice spikelet as shown in this study indicated a similar tendency with the pistil hyperplasia and stamen hypoplasia induced by stressful environments studied previously. Skikelets treated at stage II showed no morphogenetic change as spikelets treated at stage I. This difference was considered to have occurred from the difference in developmental stage of apical meristem in spikelet primordia when the chemical was applied.

【 授权许可】

Unknown