SEASHORE PASPALUM INFLORESCENCE FULL

of the family Poaceae (Graminae) commonly known as Kallar grass is a C-4 plant that grows under stressful conditions in low soil fertility, high salinity and pH 11.0. This is the first report on induction of callus and subsequent plant regeneration in kallar grass using immature inflorescence explants. Plants with well developed roots were successfully transferred to pots and grown to maturity with normal flowering and seed set. Half strength MS medium both semisolid and liquid devoid of plant growth regulators promoted highest frequency (92.8 ± 4.099 and 100 ± 0.00) of rooting in regenerated shoots. Plant regeneration was also obtained on the dicamba callus induction medium itself within 21 days inoculation of immature inflorescence explants. The regeneration frequencies ranged from 13.8 ± 1.366 to 55.5 ± 2.766 with highest number of shoots (19.1 ± 0.560) per 50–60 mg of callus as explants after 28 days of inoculation.

SEASHORE PASPALUM INFLORESCENCE FULL

Full strength MS supplemented with 2.0 mg/l NAA and 0.5 mg/l BA was found to be optimal for plant regeneration. The study demonstrated that 2.0 mg/l dicamba and 0.25 mg/l BA induced callus promoted improved frequency compared to zilch shoot regeneration response with other combinations involving 2, 4-D, picloram, KN and BA. Induction of type 2 callus (white and compact) with potential for regeneration was obtained from cold treated (3 days at 10 ☌) immature inflorescence cultured on MS medium containing 2.0 mg/l dicamba and 0.25 mg/l BA. These treatments promoted different callus induction frequencies as well as various callus types such as type 1, type 2 and type 3. The PGRs included auxins: 2, 4-dichlorophenoxy acetic acid (2, 4-D), picloram (Pic), 3, 6-dichloro-2-methoxy benzoic acid (dicamba) and cytokinins: Kinetin (KN), N6-benzyl adenine (BA). Young inflorescence explants displayed wide-ranging responses for callus induction and plant regeneration when subjected to different cold treatment durations and without cold treatment exposure (control) prior to its inoculation to MS medium supplemented with different concentrations/combinations of plant growth regulators (PGRs).

Efficient plant regeneration has been achieved from immature inflorescence derived callus cultures of salt tolerant grass Leptochloa fusca (L.).

Seashore paspalum inflorescence