Tagged: cuticular wax



Effectiveness of cuticular transpiration barriers in a desert plant at controlling water loss at high temperatures

Maintaining the integrity of the cuticular transpiration barrier even at elevated temperatures is of vital importance for hot-desert plants. In a new study published in AoB PLANTS, Schuster et al. investigated the effect of temperature on the leaf cuticular permeability of Rhazya stricta, an evergreen shrub from the Arabian Desert. Permeability increased 2.4-fold from 15° to 50° C, which is much less than in all other species studied so far. The authors propose that high amounts of pentacyclic triterpenoids (85.2% of total wax) act as fillers that mechanically stabilize the cuticle and thus prevent thermal disruption of the cuticular transpiration...

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Wax coverage on three major structures of Funaria hygrometrica.

Funaria hygrometrica gametophyte and sporophyte cuticular waxes

The waxy cuticles that coat plant surfaces have been relatively well studied in vascular plant taxa, but it is unclear how similar they may be across distant lineages. Busta et al. present comprehensive analyses of the waxes on the model moss Funaria hygrometrica including, for the first time, measurements of the amount of wax per surface area and a comparison of three aerial moss structures. These results are discussed in the context of plant evolution, the relationships between the parental and offspring moss structures, and the biosynthesis of cuticular wax compounds.

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