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Developmental and reproductive strategies of two marine algae <i>Gracilaria</i> <i>corticata </i>(Gigartinales, Rhodophyta) and <i>Asparagopsis taxiformis</i> <span style="font-size:14.0pt;line-height:115%;font-family:"Times New Roman"; mso-fareast-font-family:HiddenHorzOCR;color:black;mso-ansi-language:EN-IN; mso-fareast-language:EN-IN;mso-bidi-language:HI" lang="EN-IN">(Bonnemaisoniales, Rh<span style="font-size:14.0pt;line-height:115%;font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";color:black;mso-ansi-language:EN-IN; mso-fareast-language:EN-IN;mso-bidi-language:HI" lang="EN-IN">odophyta) from Port Okha (<span style="font-size:14.0pt;line-height:115%;font-family:"Times New Roman"; mso-fareast-font-family:HiddenHorzOCR;color:black;mso-ansi-language:EN-IN; mso-fareast-language:EN-IN;mso-bidi-language:HI" lang="EN-IN">Gujarat), <span style="font-size:14.0pt;line-height:115%;font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";color:black;mso-ansi-language:EN-IN; mso-fareast-language:EN-IN;mso-bidi-language:HI" lang="EN-IN">west coast of India</span></span></span></span>

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Title Developmental and reproductive strategies of two marine algae Gracilaria corticata (Gigartinales, Rhodophyta) and Asparagopsis taxiformis (Bonnemaisoniales, Rhodophyta) from Port Okha (Gujarat), west coast of India
 
Creator Kumar, Manoj
Jha, Aditya
Vijayaraghavan, M R
 
Description 248-252
The coastal
ecosystem of Port Okha (Gujarat) has distinct
supratidal, intertidal and subtidal zones which demand specific or particular
developmental and/or reproductive adaptations of existing algae. Gracilaria corticata
grows in

intertidal regions whereas Asparagopsis
taxiformis occurs in subtidal regions. In G. corticata wavy
outline, compact arrangement of cortex and medulla, wall ingrowths in the
medullary cells at thallus-holdfast transition zone and sulphated polysaccharides
in the intercellular mucilage provides strength and flexibility to the thallus
and protect the seaweeds against physical damage and constant environmental
stress conditions. In contrast, the rhizomatous region of A. taxiformis
does not anatomically differ from the thallus and is not modified because
the plant grows in the tidal fringe which is not subjected to strong wave
action. The well developed rhizomatous region helps the plants in propagation. Gracilaria
corticata is a dioecious plant with three distinct season specific ph ases
of diplobiontic life-cycle. However, A. taxiformis completes its life-cycle
in two phases i.e. gametophyte and carposporophyte. The carposporophyte phase of
two red algae is concerned with amplification of the diploid stage, because fertilization
chances are meagre due to non-motile sperms. The carpospores are gorged with
floridean starch grains, fibrous vesicles and chloroplasts.
 
Date 2014-01-13T05:38:26Z
2014-01-13T05:38:26Z
2000-09
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/25523
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.29(3) [September 2000]