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Anilkumar, C.
- Seed Desiccation Responses in Saraca asoca (Roxb.) W.J.de Wilde
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Authors
Affiliations
1 Seed Bank, Conservation Biology Division, Jawaharlal Nehru Tropical Botanic Garden and Research Institute, Pacha-Palode, Thiruvananthapuram 695 562, IN
1 Seed Bank, Conservation Biology Division, Jawaharlal Nehru Tropical Botanic Garden and Research Institute, Pacha-Palode, Thiruvananthapuram 695 562, IN
Source
Current Science, Vol 112, No 12 (2017), Pagination: 2462-2466Abstract
Saraca asoca is one among the 36 endangered medicinal plants of South India. As seeds are the main propagule with short viability, the present study has been carried out to assess the level of dehydration tolerance as a prerequisite to maintain extended viability. The viability and vigour of the seeds declined when their moisture content was reduced by different methods of desiccation. The critical moisture content (CMC) of the seeds was found to be 45-46%. Irrespective of the method of drying, dehydration of seeds resulted in the loss of viability, confirming their recalcitrant nature. Desiccation responses were investigated by exposing the seeds to five different conditions: (a) 30° ± 2°C, (b) silica gel, (c) 40° ± 2°C, (d) 20° ± 2°C and (e) 0° ± 2°C. The duration for reaching the critical moisture level was the longest in seeds kept in an air-conditioned room (20° ± 2°C) and minimum for those kept in a freezer (0° ± 2°C). The lowest critical moisture level (36.3%) was observed in silica gel and highest (49.2%) under freezer condition. Both the attainment and level of CMC showed marked variation under different desiccation treatments, which indicates the influence of storage temperature on CMC of S. asoca seeds.Keywords
Critical Moisture Content, Desiccation, Germination, Saraca asoca.Full Text
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- Prajith, T. M., Anilkumar, C., Kurup, R., Baby, S. and Salim, N., Comparative analysis of seed development and desiccation aspects of Saraca asoca (Roxb.) W.J. De Wilde and Caesalpinia pulcherrima (L.) Sw. Asian J. Plant Sci., 2014, 13, 164–171.
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- Fruit Predation and Adaptive Strategies of Garcinia imberti, an Endangered Species of Southern Western Ghats
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PDF Views:90
Authors
Affiliations
1 Conservation Biology Division, Jawaharlal Nehru Tropical Botanic Garden and Research Institute, Palode, Thiruvananthapuram 695 562, IN
1 Conservation Biology Division, Jawaharlal Nehru Tropical Botanic Garden and Research Institute, Palode, Thiruvananthapuram 695 562, IN
Source
Current Science, Vol 115, No 12 (2018), Pagination: 2315-2321Abstract
The germination and seedling emergence capacity of partially predated seeds of Garcinia imberti Bourd., an endemic and endangered tree species of the southern Western Ghats, was assessed with differentially devoured seeds. Pre-dispersal, fruit/seed predation by arboreal mammals especially Ratufa indica (Malabar Giant Squirrel) and to a smaller extent by Trachypithecus johnii (Nilgiri Langur) was observed. The fragmented seeds of natural predation as well as manually cut seed pieces showed speedy germination. Seed fragments with more than 50% of seed tissues showed high seed vigour index. The germination behaviour of cut seeds indirectly conveyed the simulated effect of predated seed germination in natural habitat. Germination of fragmented seeds overcomes the inevitable prolific predatory problems by frugivores. This study showed that G. imberti seeds tolerate predation to a certain extent as an adaptive character ensuring seed dispersal and seedling establishment through a unique plant–animal mutuality.Keywords
Agasthyamala Biosphere Reserve, Garcinia imberti, Plant–Animal Interaction, Seed Germination, Seed Predation.Full Text
References
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- Inheritance of Fruitinghabit Traits in Chilli (Capsicum annuum L.)
Abstract Views :279 |
PDF Views:88
Authors
Affiliations
1 Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Gandhi Krishi Vignana Kendra, Bengaluru 560 065, IN
1 Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Gandhi Krishi Vignana Kendra, Bengaluru 560 065, IN
Source
Current Science, Vol 118, No 10 (2020), Pagination: 1598-1602Abstract
Fruiting habit, viz. fruits node–1 and fruit orientation are economically important traits in chilli. Fruiting habit could be solitary erect, solitary pendant, clus-tered erect or clustered pendant. Farmers’ preference for fruiting habit traits varies from region to region. An understanding of the inheritance of fruiting habit traits helps accelerate breeding chilli cultivars with farmer-preferred combination of such traits. Eight diverse genotypes contrasting for fruiting habit traits were crossed to develop ten F1 hybrids of six combina-tions. The F2 and backcross generations of all the six distinct types of crosses were evaluated and pattern of segregation for fruiting habit traits was recorded. Results indicated bi-allelic, monogenic inheritance of fruits node–1 (solitary versus clustered) and fruit orientation (pendant versus erect) with solitary being dominant over clustered and pendant being dominant over erect orientation respectively. Genes controlling fruits node–1 and orientation of fruits segregated inde-pendently. Implications of these results are discussed in relation to strategic and applied chilli breeding.Keywords
Chilli, Fruiting Habit Traits, Goodness-of-Fit, Inheritance.Full Text
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