Abstract
Alkanes and esthers contributed up to 97% of the total epicuticular wax on cladophylls of glasshouse-grown Texas pricklypear cactus (Opuntia engelmannii var. texana [Gr.] Weniger). Alkane content increased with cladophyll age. Ester content decreased from 56% on buds to 17% on older cladophylls. Alkanes consisted of both odd- and even-numbered homologues, but odd-numbered alkanes predominated. The most prevalent carbon numbers (Cn) of alkanes from buds were C15 through C25, while those of fully expanded cladophylls produced in the year of or the year prior to sampling were C29 through C35. Both odd- and even-numbered ester components were also present, mostly C16, C18, and C30 on all cladophylls.
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