TITLE

MOVIMIENTO FOLIAR EN LARREA TRIDENTATA (SESSE & MOC. EX DC.) COV. EN RELACION CON LA SEQUIA Y LA EDAD DE LA HOJA

AUTHOR(S)
Valverde, Pedro Luis; Arizaga, Santiago; Ezcurra, Exequiel
PUB. DATE
April 1993
SOURCE
Acta Botanica Mexicana;1993, Issue 21, p15
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The creosote bush (Larrea tridentata) is a common desert perennial shrub with bifoliate, amphistomatic, divaricate leaves. The leaves can vertically close their folioles and vary their profile with respect to direct solar radiation. A greenhouse experiment was done to evaluate (a) the amount of foliole movement present in creosote saplings and (b) the influence of drought and leaf age on their movement. In the greenhouse, foliole aperture varied significantly with the water status of soil, the hour of the day and the age of the leaf. Folioles opened in the early morning and closed in the late afternoon. Stressed plants showed foliole apertures significantly lower than those of non-stressed plants. Folioles from young leaves were significantly more closed than those from mature or old leaves.
ACCESSION #
21760900

 

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