The purpose of this brief review has been to provide more recent data regarding the production of phenolic compounds by secretory structures. Although morphology and histochemistry of glands are well documented, meagre information concerning phenolics is available in the surveyed literature. Two major groups of glands are found regarding phenolic compounds synthesis: 1. secretory cells producing mainly phenolics, 2. secretory cells producing phenolics coupled with other compounds. In the former group, phenolic compounds remain in mature organs, and prevail in the material produced by epidermis, hypodermis, idioblasts, and sheath encircling vascular bundles and ducts. The latter group is constituted of trichomes, cavities, ducts, laticifers, colleters, nuptial nectaries, osmophores and stigma system, which synthesize complex mixtures of terpenes, phenolic compounds, polysaccharides and other compounds. In vegetative organs, the secretion of these glands might provide chemical defence against damage by UV radiation, against pathogen activities, and play a role in the herbivory deterrence. Additional functions ascribed to phenolics produced by floral glands are associated with pollination, pollen germination and pollen-tube elongation.
FahnA. (2000) Structure and function of secretory cells. Advances in Botanical Research, 31, 37–75.
2.
FahnA. (1979) Secretory tissues in plants. Academic Press, London.
3.
GregoryM, BaasP. (1989) A survey of mucilage cells in vegetative organs of the dicotyledons. Israel Journal of Botany, 38, 125–174.
4.
BentleyB, EliasT. (1983) The biology of nectaries. Columbia University Press, New York.
5.
RodriguezE, HealeyPL, MehtaI. (1984) Biology and chemistry of plant trichomes. Plenum Press, New York.
6.
ThomasV. (1991) Structural, functional and phylogenetic aspects of the colleter. Annals of Botany, 68, 287–305.
7.
MahlbergPG. (1993) Laticifers: an historical perspective. The Botanical Review, 59, 1–23.
8.
CsekeLJ, KaufmanPB, KirakosyanA. (2007) The biology of essential oils in the pollination of flowers. Natural Product Communications, 2, 1317–1336.
9.
WerkerE. (2000) Trichome diversity and development. Advances in Botanical Research, 31, 1–35.
10.
AscensãoL, MotaL, Castro M deM. (1999) Glandular trichomes on the leaves and flowers of Plectranthus ornatus: morphology, distribution and histochemistry. Annals of Botany, 84, 437–447.
11.
MonteiroWR, FahnA, CaldeiraW, Castro M deM. (1999) Ultrastructural observations on the foliar secretory cavities of Porophyllum lanceolatum DC. (Asteraceae). Flora, 194, 113–126.
12.
AdlerLS. (2000) The ecological significance of toxic nectar. Oikos, 91, 409–420.
GardnerRO. (1975) Vanillin-hydrochloric acid as a histochemical test for tannin. Stain Technology, 50, 315–317.
21.
GersbachPV, WyllieSG, SarafisV. (2001) A new histochemical method for localization of the site of monoterpene phenol accumulation in plant secretory structures. Annals of Botany, 88, 521–525.
22.
Charrière-LadreixY. (1976) Répartition intracellulaire du sécrétat flavonique de Populus nigra L. Planta, 129, 167–174.
23.
WollenweberE. (1982) Flavones and flavonols. In The Flavonoids: Advances in Research.HarborneJB, MabryTJ. (Eds). Chapman and Hall, London, 189–259.
24.
CrestiM, KeijzerCJ, TiezziA, CiampoliniF, FocardiS. (1986) Stigma of Nicotiana: ultrastructural and biochemical studies. American Journal of Botany, 73, 1713–1722.
25.
CartayradeA, BourgeoisG, BalzJP, CardeJP (1990) The secretory apparatus of Ginkgo biloba: structure, differentiation and analysis of the secretory product. Trees, 4, 171–178.
26.
SkubatzH, KunkelDD, HowaldWN, TrenkleR, MookherjeeB. (1996) The Sauromatum guttatum appendix as an osmophore: excretory pathways, composition of volatiles and attractiveness to insects. New Phytologist, 134, 631–640.
27.
Serrato-ValentiG, BisioA, CornaraL, CiaralloG (1997) Structural and histochemical investigation of the glandular trichomes of Salvia aurea L. leaves and chemical analysis of the essential oil. Annals of Botany, 79, 329–336.
28.
BisioA, CoralloA, GastaldoP, RomussiG, CiaralloG, FontanaN, de TommasiN, ProfumoP. (1999) Glandular hairs in Salvia blepharophylla Brandegee ex Epling grown in Italy. Annals of Botany, 83, 441–452.
29.
SoukupováJ, CvikrováJ, AlbrechtováJ, RockBN, EderJ. (2000) Histochemical and biochemical approaches to the study of phenolic compounds and peroxidases in needles of Norway spruce (Picea abies). New Phytologist, 146, 403–414.
30.
TattiniM, GravanoE, PinelliP, MulinacciN, RomaniA. (2000) Flavonoids accumulate in leaves and glandular trichomes of Phillyrea latifolia exposed to excess solar radiation. New Phytologist, 148, 69–77.
31.
CornaraL, BononiM, TateoF, Serrato-ValentiG, MariottiMG (2001) Trichomes on vegetative and reproductive organs of Stevia rebaudiana (Asteraceae). Structure and secretory products. Plant Biosystems, 135, 25–37.
32.
HeinrichG, PfeifhoferHW, StabentheinerE, SawidisT (2002) Glandular hairs of Sigesbeckia jorullensis Kunth (Asteraceae): morphology, histochemistry and composition of essential oil. Annals of Botany, 89, 459–469.
33.
JürgensA, DötterlS, MeveU. (2006) The chemical nature of fetid floral odours in stapeliads (Apocynaceae – Asclepiadoideae – Ceropegieae). New Phytologist, 172, 452–468.
34.
AlvesGM. (2006) Anatomia foliar de leguminosas arbóreas de cerrado com ênfase nas estruturas secretoras. MS Thesis, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil.
35.
RioMCS do, KinoshitaLS, Castro M deM. (2005) Anatomia foliar como subsídio para a taxonomia de espécies de Forsteronia GMey (Apocynaceae) dos cerrados paulistas. Revista Brasileira de Botânica, 28, 713–726.
36.
PerezAPF. (2005) Estudos anatômicos e fenéticos subsidiando a taxonomia no complexo Zornia diphylla (L.) Pers. (Leguminosae, Papilionoideae, Aeschynomeneae). MS Thesis, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil.
37.
AscensãoL, PaisMS. (1998) The leaf capitate trichomes of Leonotis leonurus: histochemistry, ultrastructure and secretion. Annals of Botany, 81, 263–271.
38.
TattiniM, GuidiL, Morassi-BonziL, PinelliP, RemoriniD, Degl InnocentiE, GiordanoC, MassaiR, AgatiG (2005) On the role of flavonoids in the integrated mechanisms of response of Ligustrum vulgare and Phillyrea latifolia to high solar radiation. New Phytologist, 167, 457–470.
39.
PagniAM, OrlandoR, MasiniA, CiccarelliD. (2003) Secretory structures of Santolina ligustica Arrigoni (Asteraceae), an Italian endemic species. Israel Journal of Plant Sciences, 51, 185–192.
40.
SacchettiG, BalleroM, SerafiniM, MuzzoloM, TosiB, PoliF. (2003) Morphological and histochemical investigation on glandular trichomes of Orobanche ramosa subsp. nana (Orobanchaceae). Phyton - Annales Rei Botanicae, 43, 207–214.
41.
KolbD, MüllerM. (2004) Light, conventional and environmental scanning electron microscopy of the trichomes of Cucurbita pepo subsp. pepo var. styriaca and histochemistry of glandular secretory products. Annals of Botany, 94, 515–526.
42.
GopfertJ, ConradJ, SpringO. (2006) 5-Deoxynevadensis, a novel flavone in sunflower and aspects of biosynthesis during trichome development. Natural Product Communications, 1, 935–940.
43.
CombrinckS, Du PlooyGW, McCrindleRI, BothaBM. (2007) Morphology and histochemistry of the glandular trichomes of Lippia scaberrima (Verbenaceae). Annals of Botany, 99, 1111–1119.
44.
MonteiroWR, CastroM de M, Mazzoni-ViveirosSC, MahlbergPG. (2001) Development and some histochemical aspects of foliar glandular trichomes of Stevia rebaudiana (Bert.) Bert.- Asteraceae. Revista Brasileira de Botânica, 24, 349–357.
45.
MarinM, KokoV, Duletic-LausevicS, MarinPD, RancicD, Dajic-StevanovicZ. (2006) Glandular trichomes on the leaves of Rosmarinus officinalis: morphology, stereology and histochemistry. South African Journal of Botany, 72, 378–382.
46.
MonteiroWR, CastroM de M, FahnA, CaldeiraW. (1995) Observations on the development of the foliar secretory cavities of Porophyllum lanceolatum (Asteraceae). Nordic Journal of Botany, 15, 69–76.
47.
CiccarelliD, AndreucciAC, PagniAM. (2001) Translucent glands and secretory canals in Hypericum perforatum L. (Hypericaceae): morphological, anatomical and histochemical studies during the course of ontogenesis. Annals of Botany, 88, 637–644.
48.
MetcalfeCR. (1983) Laticifers and latex. In Anatomy of the dicotyledons. Wood, structure and conclusion of the general introduction. Vol. 2, 2nd Ed, MetcalfeCR, ChalkL. (Eds). Clarendon Press, Oxford. 70–81.
49.
FarrellBD, DussourdDE, MitterC. (1991) Escalation of plant defense: do latex/resin canals spur plant diversification?American Naturalist, 138, 881–900.
50.
DickisonWC. (2000) Integrative plant anatomy. Harcourt/Academic Press, San Diego.
51.
DussourdDE, HoyleAM. (2000) Poisoned plusiines: toxicity of milkweed latex and cardenolides to some generalist caterpillars. Chemoecology, 10, 11–16.
52.
GiordaniR, TollaD, RegliP, BucJ. (2000) Role of terpenes from Asclepias curassavica latex for antifungal activity. Journal de Mycologie Medicale, 10, 34–38.
53.
AguiarS. (2003) Morfologia e ontogenia de frutos e sementes de espécies de Apocynaceae do estado de São Paulo. MS Thesis, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil.
54.
MonacelliB, VallettaA, RascioN, MoroI, PasquaG. (2005) Laticifers in Camptotheca acuminata Decne: distribution and structure. Protoplasma, 226, 155–161.
55.
DemarcoD, KinoshitaLS, Castro M deM. (2006) Laticíferos articulados anastomosados – novos registros para Apocynaceae. Revista Brasileira de Botânica, 29, 133–144.
56.
RudallPJ. (1987) Laticifers in Euphorbiaceae – a conspectus. Botanical Journal of the Linnean Society, 94, 143–163.
57.
LewinsohnTM. (1991) The geographical distribution of plant latex. Chemoecology, 2, 64–68.
58.
Appezzato-da-GlóriaB, EstelitaMEM. (1997) Laticifers systems in Mandevilla illustris and M. velutina Apocynaceae. Acta Societatis Botanicorum Poloniae, 66, 301–306.
59.
Van DieJ. (1955) A comparative study of the particle fractions from Apocynaceae latices. Annales Bogorienses, 2, 1–124.
60.
SacchettiG, BalleroM, SerafiniM, RomagnoliC, BruniA, PoliF. (1999) Laticifer tissue distribution and alkaloid location in Vinca sardoa (Stearn) Pign. (Apocynaceae), an endemic plant of Sardinia (Italy). Phyton - Annales Rei Botanicae, 39, 265–275.
61.
DemarcoD. (2005) Estruturas secretoras florais e coléteres foliares em espécies de cerrado de Aspidosperma Mart. e Blepharodon Decne. (Apocynaceae s.l.). MS Thesis, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil.
SimõesAO, CastroM de M, KinoshitaLS. (2006) Calycine colleters of seven species of Apocynaceae (Apocynoideae) from Brazil. Botanical Journal of the Linnean Society, 152, 387–398.
64.
RioMCS do, CastroM de M, KinoshitaLS. (2002) Distribuição e caracterização anatômica dos coléteres foliares de P restonia coalita (Vell.) Woodson (Apocynaceae). Revista Brasileira de Botânica, 25, 339–349.
65.
Appezzato-da-GlóriaB, EstelitaMEM. (2000) Development, structure and distribution of colleters in Mandevilla illustris and M. velutina (Apocynaceae). Revista Brasileira de Botânica, 23, 113–120.
66.
EndressPK. (1994) Diversity and Evolutionary Biology of Tropical Flowers. Cambridge University Press, Cambridge.
67.
LiuF, FuWJ, YangDR, PengYQ, ZhangXW, HeJZ. (2004) Reinforcement of bee-plant interaction by phenolics in food. Journal of Apicultural Research, 43, 155–157.
68.
JohnsonSD, HargreavesAL, BrownM. (2006) Dark, bitter-tasting nectar functions as a filter of flower visitors in a g bird-pollinated plant. Ecology, 87, 2709–2716.
69.
AfikO, DagA, KeremZ, ShafirS. (2006) Analyses of avocado (Persea americana) nectar properties and their perception by honey bees (Apis mellifera). Journal of Chemical Ecology, 32, 1949–1963.
70.
AfikO, DagA, ShafirS. (2007) Perception of avocado bloom (Lauraceae: Persea americana) by the honey bee (Hymenoptera: Apidae: Apis mellifera). Entomologia Generalis, 30, 135–153.
71.
YoshitamaK. (2000) Recent advances in secondary metabolism research: regulation of biosynthesis and physiological functions of flavonoids and some phenolics. Journal of Plant Research, 113, 285.
