Aspen Bibliography

Development of the pistillate flower of Populus tremuloides following controlled pollination

G.H. Fechner

Document Type

Article

Journal/Book Title/Conference

Canadian Journal of Botany

Volume

50

Issue

12

First Page

2503

Last Page

2509

Publication Date

1972

Abstract

Quaking aspen branches bearing female inflorescences were forced, artificially pollinated, and grown in water in the laboratory at 25 °C. The pistillate flowers developed normally to produce normal seeds in about 2 weeks. Sectioned material, which had been fixed at different times before and after pollination, revealed that the megagametophyte was in the four-nucleate stage at receptivity of the stigmas, and that it developed through the stages that Nagaraj (1952) described for natural material. Fertilization probably occurred between 72 and 120 h after pollination. Unfertilized ovules within ovaries containing one or more fertilized ovules developed normally for 1 week after pollination, but they began to degenerate soon thereafter.

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