Journal Article

Growth and development of the arborescent cactus <i>Stenocereus queretaroensis</i> in a subtropical semiarid environment, including effects of gibberellic acid

Eulogio Pimienta, Gerardo Hernandez, Alejandro Domingues and Park S. Nobel

in Tree Physiology

Volume 18, issue 1, pages 59-64
Published in print January 1998 | ISSN: 0829-318X
Published online January 1998 | e-ISSN: 1758-4469 | DOI: http://dx.doi.org/10.1093/treephys/18.1.59
Growth and development of the arborescent cactus Stenocereus queretaroensis in a subtropical semiarid environment, including effects of gibberellic acid

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In Stenocereus queretaroensis (Weber) Buxbaum, an arborescent cactus cultivated in Jalisco, Mexico, for its fruits but studied here in wild populations, stem extension occurred in the autumn at the beginning of the dry season, flowering and fruiting occurred in the spring at the end of the dry season, and new roots grew in the summer during the wet season. The asynchrony of vegetative and reproductive growth reduces competitive sink effects, which may be advantageous for wild populations growing in infertile rocky soils. Seasonal patterns of sugars in the roots and especially the stems of S. queretaroensis were closely related to the main phenological stages, becoming lower in concentration during periods of major stem extension. Cessation of stem extension occurred in 100-year-old plants for which injection of GA3 reinitiated such growth. Isolated chlorenchyma cylinders had maximum extension in a bathing solution containing 0.1 μM gibberellic acid.

Keywords: phenology; photosynthetic photon flux; pitayos; soluble sugars; stem extension

Journal Article.  0 words. 

Subjects: Plant Sciences and Forestry

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