How pine cones open

被引：458

作者：

Dawson, J ^{[1
]}

Vincent, JFV ^{[1
]}

Rocca, AM ^{[1
]}

机构：

[1] DEF CLOTHING & TEXT AGCY,COLCHESTER CO2 7SS,ESSEX,ENGLAND

来源：

NATURE | 1997年 / 390卷 / 6661期

关键词：

D O I：

10.1038/37745

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The scales of seed-bearing pine cones move in response to changes in relative humidity. The scales gape open when it is dry, releasing the cone's seeds1. When it is damp, the scales close up. The cells in a mature cone are dead, so the mechanism is passive: the structure of the scale and the walls of the cells composing the scale respond to changing relative humidity. Dissection of cones from the Monterey pine, Pinus radiata, revealed to us two types of scale growing from the main body of the cone — the ovuliferous scale and the bract scale. The larger ovuliferous scales respond to changes in relative humidity when removed from the body of the cone.

引用

页码：668 / 668

页数：1