Calcium distribution in fertile and sterile anthers of a photoperiod-sensitive genic male-sterile rice |
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Authors: | Hui Qiao Tian Anxiu Kuang Mary E Musgrave Scott D Russell |
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Institution: | (1) College of Life Sciences, Wuhan University, P.R. China, CN;(2) Department of Plant Pathology and Crop Physiology, Louisiana Agricultural Experiment Station, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA, US;(3) Department of Botany and Microbiology, University of Oklahoma, Norman, OK 73019, USA, US |
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Abstract: | Potassium antimonate was used to locate Ca2+ in fertile and sterile anthers of a photoperiod-sensitive genic male-sterile rice (Oryza sativa L. japonica). During the development of fertile anthers, abundant calcium precipitates accumulated in the anther walls and on the surface
of pollen grains and Ubish bodies at the late developmental stage of the microspore, but not in the cytoplasm of pollen grains.
Following the accumulation of starch grains in pollen, calcium precipitates on pollen walls diminished and increased in parenchymatous
cells of the connective tissue. In sterile anthers, calcium precipitates were abundant in the middle layer and endothecium,
but not in the tapetum, as was found in fertile anthers. A special cell wall was observed between the tapetum and middle layer
of sterile anthers that appeared to relate to distinctive calcium accumulation patterns and poor pollen wall formation in
the loculi. The formation of different patterns of antimonate-induced calcium precipitates in the anthers of photoperiod-sensitive
genic male-sterile rice indicates that anomalies in the distribution of calcium accumulation correlate with the failure of
pollen development and pollen abortion.
Received: 30 May 1997 / Accepted: 5 July 1997 |
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Keywords: | : Anther Calcium Male sterility Oryza (fertility) Pollen |
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