POLYAMINES INFLUENCE MATURATION IN REPRODUCTIVE STRUCTURES OF GRACILARIA CORNEA (GRACILARIALES,RHODOPHYTA)1 |
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Authors: | Alberto Guzmn‐Uristegui Pilar García‐Jimnez Fernando Marin Daniel Robledo Rafael Robaina |
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Institution: | Alberto Guzmán‐Urióstegui,Pilar García‐Jiménez,Fernando Marián,Daniel Robledo,Rafael Robaina |
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Abstract: | Naturally occurring levels of putrescine, spermidine, and spermine were analyzed in female gametophyte (nonfertilized) and reproductive tissues (cystocarps) at two different stages of development in the marine red algae Gracilaria cornea J. Agardh. Endogenous polyamine levels changed at differential stages of cystocarp maturation. Highest polyamine values were found on tissue from the early post‐fertilization stage, decreasing as the cystocarp matured. Incubation experiments revealed that exogenous polyamines induced cystocarp maturation and promoted carpospore liberation, developing cell masses within 4 to 7 days in treatments with spermine. This is the first report on the effect of polyamines on cystocarp maturation in marine algae. |
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Keywords: | carpospores cell mass cystocarp maturation Gracilaria cornea polyamines putrescine spermidine spermine |
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