The Accessory Photosynthetic Pigment Of Cyanobacteria

2868 Words Jan 6th, 2015 12 Pages
1. Introduction
34 Carotenoids are tetraterpenoids that has 40 carbon atoms chains which are obtained in the outer membrane and in 35 the thylakoids [1, 2]. Carotenoids are the accessory photosynthetic pigment of cyanobacteria [3]. In
36 cyanobacteria, β-carotene predominates in the thylakoid membranes whereas xanthophyll lies in inner and outer 37 membrane [4, 5, 6]. Carotenoids in cyanobacteria have two major functions: they are light harvesting for
38 photosynthesis and prevention from photo oxidative stress [7]. Carotenoids are utilized as natural colorants and 39 value addition for juices as well as in animal feeds like poultry and fish [8]. Carotenoids applications have also 40 reached its arm in cosmetic industries [9]. The carotenoids have nutritional and therapeutic properties by acting 41 as vitamin-A precursors [10, 11]. Carotenoids have also intrinsic anti-inflammatory and anti-cancer properties
42 [12].
43 Genus Leptolyngbya of order oscillatoriales are non-heterocystous cyanobacteria with thin filamentous cell of
44 0.5 to 3.5 µm wide with parietal thylakoids [13]. It was originally designated as “LPP−group B” by
45 bacteriologists [14] and were recently supported and justified by molecular analyses [15]. They are cosmopolitan 46 in distribution and flourished even in extreme environments like halophilous biotopes, thermal as well as mineral
47 springs [16, 17]. They are commonly found in aerophytic rocky sites or walls and soils and also dwell in
Open Document