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Devadas, R.
- Interspecific Hybrid Developed in Epidendrum Orchid from the Cross E. radicans Pav. Ex. Lindl. X E. xanthinum Lindl.
Abstract Views :193 |
PDF Views:115
Authors
Affiliations
1 NRC for Orchids, ICAR, Pakyong, Sikkim-737 016, IN
1 NRC for Orchids, ICAR, Pakyong, Sikkim-737 016, IN
Source
Journal of Horticultural Sciences, Vol 5, No 2 (2010), Pagination: 144-147Abstract
An interspecific Epidendrum hybrid was developed using E. radicans (known as 'fire star orchid', 'ground-ischolar_mained orchid') as female parent and E. xanthinum known as 'yellow orchid' as male parent. The selected line (NRCO Epidendrum cross/2005-01) was characterized for morphological and floral traits. Flower size (3.5 cm x 3.4 cm) of selected line was bigger than both parents, with bright saffron-orange colour (RHS 44A). Dorsal sepal size (1.8 cm x 0.6 cm), lateral sepal size (1.9 cm x 0.7 cm), petal size (1.8 cm x 0.6 cm), lip size (2.3 cm x 2 cm) and column size (1.1 cm x 0.2 cm) were bigger than in parents. Shape and fimbriated side lobes of lip with deep cleft of anterior margins was similar to the male parent (E. xanthinum), except colour. The F1 progeny of 'NRCO-Epidendrum cross/2005-01' flowered with different red-orange to yellow shades is categorized broadly into three types: Red-orange, Orangeyellow and Yellow. Epidendrums are popularly known as 'Crucifix orchid' and 'Poor man's orchid', have a long flowering period with 2-3 flowerings in a year, and are easy to multiply. These attributes are ideal for popularizing this plant in India as a potted plant as well garden plant.Keywords
Epidendrum Hybrids, Interspecific Hybridization, Epiphytes, Fimbriated Lip, Clefted Anterior Lobe.Full Text
- Characterization and Evaluation of a Rare Orchid Renanthera imschootiana Rolfe from Manipur & Nagaland
Abstract Views :183 |
PDF Views:115
Authors
Affiliations
1 National Research Center for Orchids, ICAR, Pakyong, Sikkim-737 106, IN
1 National Research Center for Orchids, ICAR, Pakyong, Sikkim-737 106, IN
Source
Journal of Horticultural Sciences, Vol 4, No 2 (2009), Pagination: 181-183Abstract
The orchid Renanthera imschootiana Rolfe is the only species under the genus available in India at Manipur and Nagaland, which is a part of Indo-Burma mega diversity hot-spot. The only collection, NRCO-Coll-77 (1998)/IC 566525 of this species available with us was evaluated and characterized as per 'Common Descriptors of Orchids' developed at this center. Monopodial nature in habit, un-branched raceme with a length of 32.2 cm having attractive dominant red-purple (RHS-60A) flowers and petals coloured grayed orange (RHS-164C) with shade is typical of this species. Broad, lateral sepals with attractive dominant crimson/red purple colour flower having medium-range vase life of 23.7 days, imparts high breeding value to this species for developing new hybrid derivatives.Keywords
Renanthera imschootiana, Orchid.Full Text
- Estimating Net Primary Productivity of Croplands in Indo-Gangetic Plains Using GOME-2 Sun-Induced Fluorescence and MODIS NDVI
Abstract Views :214 |
PDF Views:81
Authors
N. R. Patel
1,
Hitendra Padalia
1,
R. Devadas
2,
A. Huete
2,
A. Senthil Kumar
1,
Y. V. N. Krishna Murthy
3
Affiliations
1 Indian Institute of Remote Sensing, Dehradun 248 001, IN
2 University of Technology Sydney, Sydney, AU
3 National Remote Sensing Centre, Hyderabad 500 072, IN
1 Indian Institute of Remote Sensing, Dehradun 248 001, IN
2 University of Technology Sydney, Sydney, AU
3 National Remote Sensing Centre, Hyderabad 500 072, IN
Source
Current Science, Vol 114, No 06 (2018), Pagination: 1333-1337Abstract
Recently evolved satellite-based sun-induced fluorescence (SIF) spectroscopy is considered as a direct measure of photosynthetic activity of vegetation. We have used monthly averages of satellite-based SIF retrievals for three agricultural year cycles, i.e. May to April for each of the three years, viz. 2007–08, 2008–09 and 2009–10 to assess comparative performance of SIF and normalized difference vegetation index (NDVI) for predicting net primary productivity (NPP) over the Indo-Gangetic Plains, India. Results show that SIF values for C4 crop-dominated districts were higher than C3 crop-dominated districts during summer and low during winter for all three years. SIF explained more or less above 70% of variance in NPP. The variance explained by integrated NDVI ranged from 60% to 67%. Thus the present study has shown the potential of SIF data for improved modelling of agricultural productivity at a regional scale.Keywords
Crop Lands, Net Primary Productivity, Photosynthetic Activity, Sun-Induced Fluorescence.Full Text
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- Nayak, R. K., Patel, N. R. and Dadhwal, V. K., Estimation and analysis of terrestrial net primary productivity over India by remote-sensing-driven terrestrial biosphere model. Environ. Monit. Assess., 2010, 1, 195–213.