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Protective and defensive roles of non-glandular trichomes against multiple stresses:structure-function coordination

Journal of Forestry Research 2020年第1期31卷 1-12页

作者： George Karabourniotis Georgios Liakopoulos Dimosthenis Nikolopoulos panagiota bresta Laboratory of Plant Physiology Department of Crop ScienceAgricultural University of Athens

As superficial structures,non-glandular trichomes,protect plant organs against multiple biotic and abiotic *** protective and defensive roles of these epidermal appendages are crucial to developing organs and can be attributed to the excellent combination of suitable structural traits and chemical reinforcement in the form of phenolic compounds,primarily fl *** the formation of trichomes and the accumulation of phenolics are interrelated at the molecular *** the early stages of development,non-glandular trichomes show strong morphological similarities to glandular ones such as the balloon-like apical cells with numerous *** later developmental stages,and during secondary wall thickening,phenolics are transferred to the cell walls of the *** to the diff use deposition of phenolics in the cell walls,trichomes provide protection against UV-B radiation by behaving as optical fi lters,screening out wavelengths that could damage sensitive *** from strong visible radiation is also aff orded by increased surface light refl ***,the mixtures of trichome phenolics represent a superfi-cial chemical barrier that provides protection against biotic stress factors such as herbivores and *** the cells of some trichomes die at maturity,they can modulate their quantitative and qualitative characteristics during development,depending on the prevailing conditions of the external biotic or abiotic *** fact,the structure and chemical constituents of trichomes may change due to the particular light regime,herbivore damage,wounding,water stress,salinity and the presence of heavy ***,trichomes represent dynamic protective structures that may greatly aff ect the outcome of many plant–environment interactions.

关键词： Non-glandular trichomes Phenolics Flavonoids Protection Defence Biotic stress Abiotic stress

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