Tissue culture and Micropropagation
Keyghobad Kaikavoosi; Altaf Hosseini Nadaf; Gholamreza Bakhshi khaniki
Volume 5, Issue 9 , June 2015, , Pages 29-38
Abstract
In most transformation studies it has been indicated that adding proline to the tissue culture medium can increase the callus induction frequency and reduce induction time. Adding proline to callus induction medium in this phase can affect the production of aromatic compounds in rice and if the goal ...
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In most transformation studies it has been indicated that adding proline to the tissue culture medium can increase the callus induction frequency and reduce induction time. Adding proline to callus induction medium in this phase can affect the production of aromatic compounds in rice and if the goal of exogenous gene transformation is increasing the rice aromatic associated secondary metabolites such as 2-acetyl-1-pyrroline (2AP), this amino acid can slipup the final results. Although, absence of amino acids such as proline can reduce callus induction percentage. In this research, callus induction from two indica rice varieties; Ambemohar 157 and Indrayani were optimized, using MS medium having various concentrations of 2,4-D, without using proline. The results revealed that 2.5 mgl-1 of 2,4-D for Ambemohar 157 and 4 mgl-1 for Indrayani can lead to better callus induction. These results indicated that absence of proline can be disregard by increasing of 2,4-D concentrations. Calluses obtained from the best hormone treatment were cultured on MS fortified with 0.01 mgl-1 NAA + (1, 2, 3, 4, 5) mgl-1 BAP for shoot regeneration. The highest percentage of regeneration was achieved on MS supplemented with 2 mgl-1and 3 mgl-1 for Ambemohar157 and Indrayani cultivar respectively. Proline contents in calli which were growth in MS medium supplemented with 500 mg/L of proline showed approximately 12 to 14 fold increase over the calli growth in non-proline added medium.
