Diversity of cuticular wax among Salix species and Populus species hybrids

被引:54
作者
Cameron, KD
Teece, MA
Bevilacqua, E
Smart, LB [1 ]
机构
[1] SUNY Coll Environm Sci & Forestry, Fac Environm & Forest Biol, Syracuse, NY 13210 USA
[2] SUNY Coll Environm Sci & Forestry, Fac Chem, Syracuse, NY 13210 USA
[3] SUNY Coll Environm Sci & Forestry, Fac Forest & Nat Resources Management, Syracuse, NY 13210 USA
关键词
biomass; cuticle; poplar; Populus; short-rotation intensive culture; willow; Salix; Salicaceae;
D O I
10.1016/S0031-9422(02)00198-X
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The leaf cuticular waxes of three Salix species and two Populus species hybrids, selected for their ability to produce high amounts of biomass, were characterized. Samples were extracted in CH2Cl2 three times over the growing season. Low kV SEM was utilized to observe differences in the ultrastructure of leaf surfaces from each clone. Homologous series of wax components were classified into organic groups, and the variation in wax components due to clone, sample time, and their interaction was identified. All Salix species and Populus species hybrids showed differences in total wax load at each sampling period, whereas the pattern of wax deposition over time differed only between the Salix species. A strong positive relationship was identified between the entire homologous series of alcohols and total wax load in all clones. Similarly strong relationships were observed between fatty acids and total wax load as well as fatty acids and alcohols in two Salix species and one Populus species hybrid. One Salix species, S. dasyclados, also displayed a strong positive relationship between alcohols and alkanes. These data indicate that species grown under the same environmental conditions produce measurably different cuticular waxes and that regulation of wax production appears to be different in each species. The important roles cuticular waxes play in drought tolerance, pest, and pathogen resistance, as well as the ease of wax extraction and analysis, strongly suggest that the characteristics of the cuticular wax may prove to be useful selectable traits in a breeding program. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:715 / 725
页数:11
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