Azamal Husen , Rakesh Khali , S. Nautiyal

Abstract

Diurnal changes in chlorophyll fluorescence features in leaves of three Ficus species (F. nemoralis, F. roxburghii and F. racemosa) grown under nursery conditions were recorded in April 2003 by a portable Hansatech plant efficiency analyzer. Significant variations were observed on chlorophyll fluorescence parameters viz., Fo, Fv and Fm. Further, photochemical efficiency of photosystem (PS) II measured as Fvl Fm ratio, varied with species and with the time of observation. F. roxburghii and F. racemosa showed midday depression in Fv/Fm ratio at late noon hours (14:00 hr). However, in case of F. nemoralis mid-day depression was observed at 12:00 hr. It is therefore concluded that chlorophyll fluorescence features occurrence of mid-day depression in Fv/Fm ratio is species specific and not common phenomenon to all species.

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Azamal Husen , Rakesh Khali , S. Nautiyal , H. C. S. Bhandari

Abstract

The ischolar_maining response of nodal shoot cuttings of Grewia optiva Drummond, as influenced two phytohormones, namely, indole-3-butyrie-acid (Lea) and α-napthalenp Acetic Acid (NAA) applied in three conecntrations (1000 to 3000 ppm) were examined under intermittent mist in vermiculite culture. Assessments on ischolar_maining, sprouting as well as on ischolar_main number and their length on the cuttings were conducted after 25-days of treatments. The highest per cent ischolar_maining (75.56%) and sprouting (73.76%) was obtained from untreated cuttings. NAA 3000 ppm treated cuttings showed the lowest per cent ischolar_maining 08.89%) and sprouting 05.80%) compared to IRA treatments. However, positive response was observed in ischolar_main numbers and their length by the application of IRA and NAA. The possibilities of use nodal of shoot cuttings for raising clonal material of G. optiva, an excellent fodder tree species of mountain regions have been discussed.

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