Revision of the relationship between anther morphology and pollen sterility by cold stress at the booting stage in rice

• DOI: 10.1093/aob/mcab091
• Publication Date: 2021-07-06T12:22:16Z
• Authors: Koichi Yamamori; Kei Ogasawara; Seiya Ishiguro; Yohei Koide; Itsuro Takamure; Kaien Fujino; Yutaka Sato; Yuji Kishima
• Keywords: Tapetum

Cold stress in rice (Oryza sativa) plants at the reproductive stage prevents normal anther development and causes pollen sterility. Tapetum hypertrophy anthers has been associated with sterility response to cold booting stage. Here, we re-examined whether relationships between abnormality caused by can be explained a monovalent factor such as tapetum hypertrophy.After exposing 4-d treatment stage, collected processed for transverse sectioning immediately flowering We anatomically evaluated effect of on internal morphologies, fertilities numbers 13 cultivars various sensitivities.We observed four types morphological abnormalities each Pollen was positively correlated frequency undeveloped locules, but not commonly believed. In cold-sensitive grown low temperatures, more frequent than abnormalities, some lines showed remarkably high without any alterations. Most anomalies occurred only specific areas within large small locules. Anther length tended shorten number. One cultivar considerably reduced number, fertile grains under stress. propose three possible explain structure reduction due stress.The entire locule-related which might represent phenotypic consequence, direct cause abortion. Multivalent factors underlie complicated rice.