Gibberellic acid and 2,4-D as growth regulators in laboratory culture of seaweeds

Imelda, Joseph and Chennubhotla, V S Krishnamurthy (1999) Gibberellic acid and 2,4-D as growth regulators in laboratory culture of seaweeds. Indian Journal of Marine Sciences, 28. pp. 66-69.


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    The growth regulatory effects of gibberellic acid (GA) and 2,4-D (2,4-dichlorophenoxy acetic acid) on a green alga, Ulva fasciata and two species of red algae, Gracilaria corlicata and Hypnea valentiae were studied. For a culture period of 30 days, the thallus segments showed varying growth rates on pretreatment with 6 to 20 mg/1 of the above growth substances. These compounds stimulated growth and increased wet weight o f the algae. At higher concentrations (16-20mg/l) 2,4-D was growth inhibitory, whereas, GA showed significantly higher growth at 16-20mg/l concentrations. It is concluded with the present study that plant hormones like GA and 2,4-D could be used for enhancement o f algal production in culture practices at different concentrations.

    Item Type: Article
    Uncontrolled Keywords: Gibberellic acid; 2,4-D; growth regulators; laboratory culture; seaweeds
    Subjects: Algae > Algal nutrition
    Algae > Seaweed
    Divisions: CMFRI-Kochi > Mariculture
    Subject Area > CMFRI > CMFRI-Kochi > Mariculture
    CMFRI-Kochi > Mariculture
    Subject Area > CMFRI-Kochi > Mariculture
    Depositing User: Arun Surendran
    Date Deposited: 16 Jul 2013 11:11
    Last Modified: 09 Sep 2015 15:54

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