A complex photoreceptive structure in the cyanobacterium Leptolyngbya sp.

被引：33

作者：

Albertano, P

Barsanti, L

Passarelli, V

Gualtieri, P

机构：

[1] CNR, Ist Biofis, I-56127 Pisa, Italy

[2] Univ Roma Tor Vergata, Dipartimento Biol, I-00113 Rome, Italy

来源：

MICRON | 2000年 / 31卷 / 01期

关键词：

cyanobacteria; microspectroscopy; photoreception; prokaryote; rhodopsin-like protein;

D O I：

10.1016/S0968-4328(99)00063-3

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

Among the terrestrial epilithic cyanobacteria isolated from Roman hypogea at extremely low light intensity, a non-heterocystous strain, belonging to the genus Leptolyngbya, showed a marked photobehavior. These red cyanobacteria possess an orange spot at the tip of the apical cell. Micro-spectrophotometric analysis of this tip showed an absorption spectrum with two bands, centered at 456 and 504 nm, respectively. Experiments on photo-orientation impairment of these cells, and micro-spectrophotometric analysis of the tip of impaired trichomes showed that a rhodopsin-like protein might be present in this structure. All these data could support the hypothesis of the presence of a complex photoreceptive system in this prokaryote. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：27 / 34

页数：8

共 36 条

[1]

ALBERTANO P, 1991, ARCH HYDROBIOL ALGOL, V64, P199

[2]

ANAGNOSTIDIS K, 1988, Archiv fuer Hydrobiologie Supplement, V80, P1

[3] COMPLETE CHEMICAL-STRUCTURE OF PHOTOACTIVE YELLOW PROTEIN - NOVEL THIOESTER-LINKED 4-HYDROXYCINNAMYL CHROMOPHORE AND PHOTOCYCLE CHEMIST [J].