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Titre : Aspects of thorn development on Prosopis juliflora (Swartz) DC. var. velutina (Woot.) Sarg. and Cercidium australe I. M. Johnson

Auteur : Karpiscak, Martin M.

Université de soutenance : University of Arizona

Grade : Master of Science (MS) 1973

Résumé
Greenhouse grown seedlings of Prosopis juliflora (Swartz) DCo var0 velutina (Wooto) Sargo were subjected to various degrees of stem removal in order to determine the effects of various degrees of simulated "browsing . (clipping) on thorn development„ Prosopis seedlings, grown in controlled environment chambers, were also exposed to varying light intensities, temperature regimes, moisture levels and concentrations of IAA to observe the effects of such exposure on thorn development, number of nodes per plant and stem length® Seedlings of Cercidium australe I® M® Johnston were included in the light intensity experiments® Simulated browsing did not appear to affect thorn length of mesquite in any measurable manner, nor did the application of IAA® ’ Thorn growth of both Cercidium and Prosopis was found to be favored by high light intensities® Low temperatures and high moisture levels were determined to be important factors promoting the development of thorns in seedlings of Prosopis jruliflora

Mots clés : Thorns. ; Spines (Botany) ; Mesquite.

Présentation

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