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Effect of Light on Growth and Development of Field Bindweed (Convolvulus arvensis) and Russian Knapweed (Centaurea repens)

Published online by Cambridge University Press:  12 June 2017

Armando A. Dall'Armellina  and
Robert L. Zimdahl
Armando A. Dall'Armellina
Affiliation:
Instituto de Desarrollo del Valle Inferior del Rio Negro, IDEVI. 8500-Viedma, Rio Negro, Argentina
Robert L. Zimdahl
Affiliation:
Dep. Plant Pathol. and Weed Sci., Colorado State Univ., Fort Collins, CO 80523
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Abstract

Field bindweed and Russian knapweed were grown from seed or rhizome segments under 520, 325, or 236 μmol·m–2 · s–1 photosynthetic photon flux density (PPFD) to determine vegetative and reproductive response. Flower production in both species declined with decreasing light level. Leaf area of field bindweed decreased as light level decreased, but Russian knapweed leaf area increased as light intensity decreased from 520 to 325 μmol·m–2 ·s–1 PPFD or from 520 to 236 μmol·m–2 ·s–1. Dry matter of shoots, roots, and rhizomes of field bindweed grown from seed declined as light level decreased, but the only response of plants grown from rhizome segments was complete inhibition of rhizome production. Dry matter of Russian knapweed shoots and roots in plants grown from seed or rhizome segments decreased as light decreased. In both species the total PPFD was more important than whether low or high light level occurred first.

Keywords

Field bindweed, Convolvulus arvensis L. # CONARRussian knapweed, Centaurea repens L. # CENREPerennial weedsshadeCONARCENRE
Type
Weed Biology and Ecology
Information
Weed Science , Volume 36 , Issue 6 , November 1988 , pp. 779 - 783
Copyright
Copyright © 1988 by the Weed Science Society of America 

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References

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