CYTOPHYSIOLOGICAL FEATURES OF POSIDONIA OCEANICA AS PUTATIVE MARKERS OF ENVIRONMENTAL CONDITIONS

被引：15

作者：

Cozza, R. ^{[1
]}

Chiappetta, A. ^{[1
]}

Petrarulo, M. ^{[1
]}

Salimonti, A. ^{[1
]}

Rende, F. ^{[1
]}

Bitonti, M. B. ^{[1
]}

Innocenti, A. M. ^{[1
]}

机构：

[1] Univ Calabria, Dipartimento Ecol, I-87030 Arcavacata Di Rende, CS, Italy

来源：

CHEMISTRY AND ECOLOGY | 2004年 / 20卷 / 03期

关键词：

Posidonia oceanica; Phenolics; Cytokinins; Environmental stress;

D O I：

10.1080/02757540410001689777

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Posidonia oceanica beds form one of the most important coastal ecosystems in the Mediterranean basin and represent a good indicator of the seawater quality, being strongly sensitive to human perturbations. The aim of the present study is to verify whether changes in cytophysiological features of this seagrass could mark early altered environmental conditions. In this context, we investigated in juvenile and intermediate leaves: (1) the presence and structure of phenolic compounds, due to their role in the defence response against biotic and abiotic stress; (2) the presence and distribution of cytokinins, because of their key role in leaf growth and senescence as well as in relation to their interaction in light signalling. Significant and measurable increases in the amount of phenols as well as changes in cytokinins distribution were detected in Posidonia leaves collected from meadows subjected to disturbed environmental conditions as compared to those of preserved ones. These results clearly indicated that these variables could be used as early biomarkers of environmental quality.

引用

页码：215 / 223

页数：9

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