[Ultrastructural localization of ATPase activity in fertile and sterile anther of rice (Oryza sativa L. cv. Marxie)].
Pb3 (po4)2-precipitation was used to study the ATPase activities both in fertile and sterile anthers of rice (Oryza sativa L. cv. Marxie). At big-vacuole pollen stage, tapetum of the fertile anthers showed high ATPase activity in their nuclei. In fertile pollen, ATPase was localized on the outside surface of the exine and in the nucleus both at big-vacuole and at bi-nucleate pollen stage. At late bi-nucleate pollen stage, a large amount of Pb3 (PO4)2 precipitated in endintine of the fertile pollen. In sterile anthers, tapetum was fully degenerated at big-vacuole pollen stage. In sterile pollen, ATPase was localized both on the plasmamembrane and in intine. These phenomena lasted to the bi-nucleate pollen stage. In addition, most of the sterile pollen did not show well-developed endintine. Based on the above results, we suggested that abortive tapetum could not provide enough nutrition for pollen development, and the high ATPase activity both on plasma membrane and in intine would likely result in ATP shortage in sterile anthers.
Guan
H X
HX
Agricultural College, Guangxi University, Nanning 530004.
Zhu
Y G
YG
Lan
S Y
SY
Xu
Z X
ZX
D000251:Adenosine Triphosphatases / Q000378:metabolism*; D005298:Fertility; D012275:Oryza / Q000201:enzymology* / Q000648:ultrastructure; D011058:Pollen / Q000201:enzymology
D000251:Adenosine Triphosphatases