Histochemical localization and characterization of chalcones on the foliar surface of Zuccagnia punctata Cav. Insights into their physiological role

被引：9

作者：

Alejandra Moreno, Maria ^{[1
]}

Ines Mercado, Maria ^{[3
]}

Nuno, Gabriela ^{[1
]}

Catiana Zampini, Iris ^{[1
,2
,3
]}

Soledad Cuello, Ana ^{[1
]}

Ines Ponessa, Graciela ^{[3
]}

Esteban Sayago, Jorge ^{[1
,2
]}

Ines Isla, Maria ^{[1
,2
,3
]}

机构：

[1] Consejo Nacl Invest Cient & Tecn, Inst Quim Noroeste Argentino INQUINOA, RA-1033 Buenos Aires, DF, Argentina

[2] Univ Nacl Tucuman, Fac Ciencias Nat, San Miguel De Tucuman, Argentina

[3] Fdn Miguel Lillo, Area Bot, Inst Morfol Vegetal, San Miguel De Tucuman, Argentina

来源：

PHYTOCHEMISTRY LETTERS | 2015年 / 13卷

关键词：

Zuccagnia punctata; Foliar washing; Chemical localization; Dihydroxychalcones; FLAVONOIDS; EXTRACTS;

D O I：

10.1016/j.phytol.2015.05.026

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Dihydroxychalcones as well as other metabolites synthesized via the phenylpropanoid pathway have a wide range of biological activities. Although this class of phenolic compounds is found in very large amounts in some tissues, their physiological significance remains unclear. This approach focused on the chemical analysis of Zuccagnia punctata leaf rinse extract in which dihydroxychalcones (99.25 mu g 2',4'-dihydroxychalcone/cm(2) and 73.38 mu g 2',4'-dihydroxy-3'-methoxychalcone/cm(2)) are the main constituents. Histochemical analysis (fluorescence microscope and emission scanning electron microscope coupled with an energy dispersive X-ray spectrometer) revealed a high flavonoid concentration on the foliar surface. The high accumulation of phenolic compounds, flavonoids or chalcones in the cuticle of Z. punctata leaves would act as defense mechanisms against UV radiation for the protection of photosynthetic tissues against oxidative stress. (C) 2015 Phytochemical Society of Europe. Published by Elsevier B.V. All rights reserved.

引用

页码：134 / 140

页数：7

共 29 条

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