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Bhatt, R. M.
- Influence of Exogenous Glycinebetaine on Hot Pepper under Water Stress
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1 Division of Plant Physiology and Biochemistry, ICAR-Indian Institute of Horticultural Research, Hesaraghatta Lake Post, Bengaluru - 560 089, IN
1 Division of Plant Physiology and Biochemistry, ICAR-Indian Institute of Horticultural Research, Hesaraghatta Lake Post, Bengaluru - 560 089, IN
Source
Journal of Horticultural Sciences, Vol 9, No 2 (2014), Pagination: 153-156Abstract
A study was conducted to evaluate the effect of exogenous application of glycinebetaine (GB) on physiological response in hot-pepper (Capsicum annuum L. vs. Arka Lohit and Pusa Jwala) under water stress. Glycinebetaine was applied to seeds as well as plants through foliar applications. Water stress affected considerably the morphophysiological parameters in both the cultivars. However, in glycinebetaine (GB) treated plants, plant height, leaf area (LA), flower and fruit number and total dry matter (TDM) were greater compared to the untreated stress plants (T4) under water stress. Glycinebetaine application enhanced the photosynthesis (PN) in water deficit experiencing plants, mostly due to a greater stomatal conductance (gs) and carboxylation efficiency of CO2 assimilation. In both the cultivars after 12 day of stress, the PN decreased from 10.1 to 1.0-1.3 μ mol m-2 s-1 in untreated stressed plants (T4), while in the treated stressed plants PN had reduced to 2.0 - 3.0 μ mol m-2 s-1 (T1 - T3). The application of GB increased the WUE in both the cultivars. The better WUE in treated plants of hot-pepper under stress was attributed to the improved PN. The higher per plant yield in the GB applied plants under stress in both the cultivars associated with higher PN rate, gs and WUE in treated plants. Though there was an increase in PN rate, WUE and plant yield in the treated plants (T1 - T3), the better results were found in the plants (T2) where seeds were treated and foliar application was given at the time of imposing stress.Keywords
Glycinebetaine, Hot Pepper, Photosynthesis, Stomatal Conductance.- Seed Germination and Seedling Growth in Solanum Species to Water Stress under in vitro Conditions
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PDF Views:129
Authors
Affiliations
1 Division of Plant Physiology and Biochemistry, Indian Institute of Horticultural Research, Hessaraghatta lake Post, Bangalore - 560 089, IN
1 Division of Plant Physiology and Biochemistry, Indian Institute of Horticultural Research, Hessaraghatta lake Post, Bangalore - 560 089, IN
Source
Journal of Horticultural Sciences, Vol 8, No 2 (2013), Pagination: 262-267Abstract
A study on seed germination and seedling growth was conducted with five cultivars of Solanum melongena L. (cvs. Arka Nidhi, B.P.L.H.-1, Arka Neelakanth, Arka Keshav and Mattu Gulla) and a wild species Solanum macrocarpon L. under different levels of osmotic potential induced by polyethylene glycol (PEG 8000). Germination declined progressively in response to decreasing (more negative) water potential, and no germination was found beyond - 0.4MPa in any of the cultivars/species. Except for cvs. Arka Nidhi, B.P.L.H.-1 and Mattu Gulla, no germination was seen at -0.4MPa Cultivar Arka Neelkanth failed to germinate under any of the osmotic concentrations tested. Response in term of ischolar_main growth was better in Arka Neelkanth, followed by Arka Nidhi and B.P.L.H.-1, upto transfer from different levels of osmotic potential to Control (0MPa). Germination of primed seeds within 24h indicates that many processes leading to normal germination would have been completed during the priming process itself. In contrast to germination, growth extension in radicle was less sensitive to water stress.Keywords
Brinjal, Germination, Osmotic Potential, Water Stress.- Effect of Soil Moisture Stress on Physiological Response in Grape (Vitis vinifera L.) Varieties
Abstract Views :214 |
PDF Views:131
Authors
Affiliations
1 National Research Centre for Grapes, P.B. # 3, Manjari Farm, Solapur Road Pune – 412 307, IN
2 Division of Fruit Crops, Indian Institute of Horticultural Research, Bangalore - 560 089, IN
3 Division of Plant Physiology and Biochemistry, Indian Institute of Horticultural Research, Bangalore - 560 089, IN
1 National Research Centre for Grapes, P.B. # 3, Manjari Farm, Solapur Road Pune – 412 307, IN
2 Division of Fruit Crops, Indian Institute of Horticultural Research, Bangalore - 560 089, IN
3 Division of Plant Physiology and Biochemistry, Indian Institute of Horticultural Research, Bangalore - 560 089, IN
Source
Journal of Horticultural Sciences, Vol 1, No 2 (2006), Pagination: 99-103Abstract
Four varieties of grape namely Flame Seedless, Thompson Seedless, Sharad Seedless and Tas-A-Ganesh were subjected to different levels of moisture stress to study their physiological response. Stress was imposed for 14 days by withholding irrigation. Observations on relative water content, leaf water potential, leaf osmotic potential and gas exchange parameters like photosynthetic rate, transpiration rate, stomatal conductance and water use efficiency (WUE) were recorded. None of the varieties could survive for 14 days without irrigation (100% stress). Flame Seedless and Thompson Seedless at 50% moisture stress maintained higher turgidity as indicated by lesser reduction in relative water content and water potential attributed to better osmotic adjustment. Marginal reduction in photosynthesis and greater reduction in transpiration rate in the variety Flame Seedless may have resulted in higher WUE under moisture stress. Higher photosynthetic rate, lower transpiration rate, higher water relation parameters and high WUE in Flame Seedless under soil moisture stress indicated its better tolerance to drought.Keywords
Grape Varieties, Soil Moisture Stress, Water Potential, Water Use Efficiency.- Carbon Sequestration Potential of Mango Orchards in the Tropical Hot and Humid Climate of Konkan Region, India
Abstract Views :219 |
PDF Views:83
Authors
Affiliations
1 ICAR- Indian Institute of Horticultural Research, Bengaluru 560 089, IN
1 ICAR- Indian Institute of Horticultural Research, Bengaluru 560 089, IN
Source
Current Science, Vol 116, No 8 (2019), Pagination: 1417-1423Abstract
Cultivated grafted mangoes are not the same as polyembryonic seedling-based wild mangoes in terms of biomass production and carbon sequestration. We estimated the carbon sequestration potential of mangoes in Konkan region, which is a prime mango belt of India producing the popular Alphonso mangoes. Allometric equation developed for grafted mangoes was used to estimate tree biomass. Konkan mango belt spread over 106,210 ha sequesters 9.913 mt of carbon. However, the carbon sequestration potential of these cultivated grafted mangoes is very low compared to polyembryonic seedling-grown mangoes in the wild. Since mangoes in the Konkan region have mostly occupied degraded lands of lateritic origin, such regions have been brought under productive mango orchards. As a consequence where forests have disappeared and mangoes have occupied the region, the carbon sequestered by them is a bonus apart from the production of mangoes. The administrators in these regions must use this information for claiming carbon credits for the benefit of farmers and the local population.Keywords
Carbon Sequestration, Mango Orchards, Soil Carbon Stocks, Tree Biomass.References
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- Breeding for Improvement of High Temperature Tolerance in Garden Pea (Pisum sativum L.) for off Season Cultivation
Abstract Views :448 |
PDF Views:283
Authors
Affiliations
1 Division of vegetable crops, ICAR-Indian Institute of Horticultural Research, Bengaluru - 560 089, IN
2 Divison of Plant Physiology and Biochemisrty, ICAR-Indian Institute of Horticultural Research, Bengaluru - 560 089, IN
1 Division of vegetable crops, ICAR-Indian Institute of Horticultural Research, Bengaluru - 560 089, IN
2 Divison of Plant Physiology and Biochemisrty, ICAR-Indian Institute of Horticultural Research, Bengaluru - 560 089, IN
Source
Journal of Horticultural Sciences, Vol 15, No 1 (2020), Pagination: 62-66Abstract
The present investigation is aimed towards breeding varieties of garden pea for early summer cultivation (March-May) that can tolerate temperatures up to 350C. High temperature tolerant accessions KTP-4, Arka Sampoorna, Oregon Sugar, Magadi local were crossed with Arka Ajit, Arka Pramodh, Arka Priya having superior pod quality, yield and followed by pedigree method of breeding, superior transgressive segregants from these crosses were advanced up to F7 generation. In F7, six selected advanced breeding lines were assessed for their performance in the field with checks during early summer for four years in succession. Results revealed significant differences between selected lines and checks wherein all the lines surpassed checks with yield ranging from 5.9-7.6 t/ ha and in checks it was only 2.6-3.1 t/ha. Among these six breeding lines, three lines were selected based on high yield (6.7-7.6 t/ha), pod quality characters and identified to be highly suitable for early summer cultivation.Keywords
Breeding, Early Summer, Garden Pea, High Temperature, Stress Tolerance.References
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