caa a22 4500 469096055 CHVBK 20180323133031.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF00317467 doi (NATIONALLICENCE)springer-10.1007/BF00317467 Variation in leaf trichomes and nutrients of Wigandia urens (Hydrophyllaceae) and its implications for herbivory [Elektronische Daten] [Zenón Cano-Santana, Ken Oyama] Leaf trichome variation was studied in a population of Wigandia urens (Hydrophyllaceae) in relation to water availability, diversity of herbivorous insects, and grazing rates. Plants of W. urens have glandular and urticant (stinging hairs) trichomes, and it is possible to distinguish two types of leaves: "smooth” leaves with only glandular trichomes and "bristly” leaves with both types of trichomes. Density of urticant trichomes was negatively correlated with weekly mean precipitation. Fourteen species of insects in five different orders feed on leaves of W. urens throughout the year. Grazing rates varied according to type and age of leaves. Grazing rates were lower in smooth than bristly young leaves but the rates were similar for mature leaves. Secondary metabolites, screened using qualitative methods, showed similar classes of compounds in both types of leaves. Bristly leaves had significantly higher concentrations of nitrogen, phosphorous and water and these nutritional differences were well correlated with the differences in grazing rates between bristly and smooth leaves. Springer-Verlag, 1992 Wigandia urens nationallicence Leaf trichomes nationallicence Herbivory nationallicence Intraspecific variation nationallicence Insects diversity nationallicence Cano-Santana Zenón Centro de Ecología, Universidad Nacional Autónoma de México (UNAM), Apartado Postal 70-275, 04510, México, D.F., Mexico aut Oyama Ken Centro de Ecología, Universidad Nacional Autónoma de México (UNAM), Apartado Postal 70-275, 04510, México, D.F., Mexico aut Oecologia Springer-Verlag 92/3(1992-12-01), 405-409 0029-8549 92:3<405 1992 92 442 https://doi.org/10.1007/BF00317467 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317467 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cano-Santana Zenón Centro de Ecología, Universidad Nacional Autónoma de México (UNAM), Apartado Postal 70-275, 04510, México, D.F., Mexico aut NATIONALLICENCE 700 1- Oyama Ken Centro de Ecología, Universidad Nacional Autónoma de México (UNAM), Apartado Postal 70-275, 04510, México, D.F., Mexico aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 92/3(1992-12-01), 405-409 0029-8549 92:3<405 1992 92 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer