Gopi Chand , Anil Sood

Abstract

The influence of growth regulators IAA, IBA and NAA on the seed germination of Dendrocalamus strictus Nees at three different concentrations i.e., 100, 200 and 500 mg/l has been studied. The germination percentage, stem height, ischolar_main length, number of ischolar_mains and leaves per plant were recorded after one month of germination and after one year. The maximum germination (about 69%) was recorded in IBA while in control, it was 52%. On the basis of statistically analysed parameters, it was found that all the growth regulators IAA, IBA and NAA were statistically significant in terms of germination percentage; stem height, ischolar_main length, number of ischolar_mains and leaves per plant. As the parameters were recorded after one year, the plant height and number of tillers per plant were also found to be statistically significant. In terms of concentrations, all the concentrations were also statistically significant along with stem height and ischolar_main length. While these parameters i.e., plant height and number of tillers per plant were statistically non-significant after one year. The experiments were conducted in polysleeves with single seed in each sleeve.

Keywords

Dendrocalamus strictus, Seedling Germination, Growth Regulators

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Gopi Chand , R. D. Singh , Ramjee Lal Meena , Brij Lal

Abstract

The study was conducted to evaluate plant growth regulators (PGR) viz., IAA, IBA and NAA at three concentrations, 50, 100 and 200 mg/l, in terms of rate of sprouting in stem-cuttings and growth of the sprouted cuttings of Tylophora asthmatica, during July 2004 and 2006 in Palampur at mid hills of western Himalaya. Observations were recorded on sprouting rate, leaves per sprouted cutting, length of sprouted shoots and length of ischolar_mains. Cuttings treated with IAA showed more than 50% sprouting, which was significantly higher than that due to other treatments and untreated control. Also, IAA was statistically superior to other PGRs in terms of growth of the sprouted cuttings. In terms of sprouting rate, the lowest rate of PGRs (50 mg/l) was more effective than the higher doses. In terms of biomass production, plant spacing of 50 × 25 cm and 50 × 50 cm were statistically comparable.

Keywords

Asthma, Bronchitis, Diarrhea, IAA, IBA, NAA, Whooping-cough

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