HOW PORTULACA SEEDLINGS AVOID THEIR NEIGHBORS

被引：106

作者：

NOVOPLANSKY, A

COHEN, D

SACHS, T

机构：

[1] Department of Botany, The Hebrew University of Jerusalem, Jerusalem, 91904, Berman Building

来源：

OECOLOGIA | 1990年 / 82卷 / 04期

关键词：

Developmental plasticity; Environmental signals; Far-red light; Phytochrome; Plant competition; Portulaca oleracea L;

D O I：

10.1007/BF00319791

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Portulaca oleracea L. seedlings do not develop in the direction of neighbours, even when these neighbours are small and distant. Neighbouring plants could be simulated by small rectangles of a plastic that resembled leaves in its spectral characteristics. Unlike seedlings, mature plants did not respond to objects that do not influence photosynthetic light. When light of equal intensity was received from all directions, Portulaca seedlings avoided the direction with higher far-red light. Portulaca is thus able to use spectral composition and direction of light as clues for the probability of the direction of future shade. © 1990 Springer-Verlag.

引用

页码：490 / 493

页数：4

共 13 条

[1]

BALLARE CL, 1987, PLANT CELL ENVIRON, V10, P551, DOI 10.1111/j.1365-3040.1987.tb01835.x

[2] THE EFFECT OF PLANT-DENSITY ON TILLERING - THE INVOLVEMENT OF R/FR RATIO AND THE PROPORTION OF RADIATION INTERCEPTED PER PLANT [J].