Relationship between Male Sterlity and Change of IAA and ABA Contents in‘Niitaka’Pear

ACTA HORTICULTURAE SINICA ›› 2006, Vol. 33 ›› Issue (6): 1291-1294.

• 研究报告 • Previous Articles Next Articles

Relationship between Male Sterlity and Change of IAA and ABA Contents in‘Niitaka’Pear

Li Liulin^{1, 2};Wu Juyou¹;Zhang Shaoling¹

(¹College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China; ²College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi 030801, China)

Received:2006-01-09 Revised:2006-04-29 Online:2006-12-25 Published:2006-12-25
Contact: Zhang Shaoling

Abstract

Abstract: The contents of indole-3-acetic acid ( IAA) and abscisic acid (ABA) , the activity of IAA oxidase and peroxidase ( POD) , and micro element contents were examined in floral buds or anther of male sterile pear cultivar‘Niitaka’and male fertile pear cultivar‘Housui’ ( Pyrus pyrifolia Nakai) at different stages of pollen development, in order to exp lore the relation of IAA and ABA with male sterility of pear and reason of IAA deficiency. The results indicated that IAA content in floral bud of Housuiwas very significantly higher than that of Niitaka after tetrad stage. At the stage of pollen abortion, namely from arlymononucleate pollen stage to later stage of mononucleate pollen, IAA content of Housui was 3.70 to 4.47 folds of Niitaka. IAA deficiency in Niitaka was one of reasons that lead to pollen abortion; IAA oxidase activity in floral bud in prophase of pollen development of Niitaka was significantly higher than that of Housui. The change of POD activity in two pear cultivarswas very similar, and difference of POD activity was not significant, which suggesting that POD was not key enzyme that lead to IAA deficiency. Zinc content in Niitaka was significantly lower than that of Housui, butmanganese content was significantly higher aftermononucleate stage. ABA content in Niitaka was significantly higher than that of Housui from tetrad to binucleate stage, however, ABA was accumulated in mature anther of Housui.

Key words: Pear, Male sterility, IAA, ABA

CLC Number:

S661.2

Li Liulin;;Wu Juyou;Zhang Shaoling. Relationship between Male Sterlity and Change of IAA and ABA Contents in‘Niitaka’Pear[J]. ACTA HORTICULTURAE SINICA, 2006, 33(6): 1291-1294.

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Relationship between Male Sterlity and Change of IAA and ABA Contents in‘Niitaka’Pear

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