Inhibitory effects of Hymenaea and Copaifera leaf resins on the leaf fungus, Pestalotia subcuticularis

Biology of Amber-Producing Trees: Focus on Case Studies of Hymenaea and Agathis

“…The greatest number of compositional types (at least six) occurred in rainforest populations, whereas often only a single type occurred in dry forest populations, a finding that also points to the greater biotic pressures in the former. Laboratory experiments and field studies with various lepidopterans, the primary foliovores (86)(87)(88)(89)(90), and with frequent leaf-spotting fungi (91) Thus, for amber studies it is important not to draw arbitrary conclusions regarding compositional variation being primarily species related-especially with the small sample size often available for amber analysis. Rather it is important to recognize the potential for tree-to-tree quantitative compositional variation that may well relate to the defensive role of the resin.…”

Oil Glands in Pterodon pubescens Benth. (Leguminosae-Papilionoideae): Distribution, Structure, and Secretion Mechanisms

“…These structures in legumes have taxonomic (Turner 1986;Lersten and Curtis 1996;Teixeira et al 2000;Gabrielli 2000, 2006), ecological (Langenheim et al 1982;Arrhenius and Langenheim 1983;Langenheim 2003), and economic (Coelho et al 2001;Langenheim 2003;Plowden 2003) aspects. Some of the substances produced by the cavities or canals, mainly the terpenes, aid in plant resistance to microbial attack and protection against predators (Langenheim et al 1982;Arrhenius and Langenheim 1983). The active substances synthesized by these secretory structures have been exploited by cosmetic, pharmaceutical, and other industries (Langenheim 2003).…”

Variação de terpenos em Hyptis suaveolens e seu papel na defesa contra herbívoros

“…As substâncias secundárias têm sido amplamente discutidas quanto às seguintes funções: ecológicas (Seigler, 1977); alelopáticas (Whittaker & Feeny, 1971;Halligan, 1975;Feeny, 1977;Ricc, 1977); de atração de polinizadores (Cammerloher, 1931;Williams, 1983); de defesa contra herbívoros (Smith, 1965(Smith, , 1966Rehr et ai., 1973;Cates, 1975;Langenheim et ai., 1977Langenheim et ai., , 1980; patógenas (Levin, 1976;Feeny, 1977;Arrhenius & Langenheim, 1983), e algumas como reguladoras do desenvolvimento de plantas superiores (Gross, 1975).…”