MALE GAMETOPHYTIC SELECTION-A NOVEL TECHNIQUE FOR WATER STRESS TOLERANCE IN BLACK PEPPER (Piper nigrum)

STEPHEN ROY¹*, R.V. MANJU², R. LALI³, J.J. LINI⁴, B.S. ANILA⁵, VIPIN MOHAN⁶, R. GAYATHRI^7
1Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvanathapuram, 695522, Kerala Agricultural University, Thrissur, 680656, Kerala, India
²Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvanathapuram, 695522, Kerala Agricultural University, Thrissur, 680656, Kerala, India
³Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvanathapuram, 695522, Kerala Agricultural University, Thrissur, 680656, Kerala, India
⁴Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvanathapuram, 695522, Kerala Agricultural University, Thrissur, 680656, Kerala, India
⁵Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvanathapuram, 695522, Kerala Agricultural University, Thrissur, 680656, Kerala, India
⁶Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvanathapuram, 695522, Kerala Agricultural University, Thrissur, 680656, Kerala, India
⁷Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvanathapuram, 695522, Kerala Agricultural University, Thrissur, 680656, Kerala, India
* Corresponding Author : roykau@gmail.com

Received : 07-07-2018     Accepted : 25-07-2018     Published : 30-07-2018
Volume : 10     Issue : 14       Pages : 6700 - 6702
Int J Agr Sci 10.14 (2018):6700-6702

Keywords : Black pepper, Pollination and fertilization
Conflict of Interest : None declared
Acknowledgements/Funding : This research was funded by the Kerala State Council for Science Technology and Environment (T412/SRS/2010/CSTE). Author thankful to College of Agriculture, Vellayani, Thiruvanathapuram, 695522, Kerala Agricultural University, Thrissur, Kerala 680656
Author Contribution : All author equally contributed

Black pepper crop in Kerala suffers prolonged drought from December to May and the resulting water stress in combination with high temperature is the major factor for its low productivity. Black pepper vines will not have tap root system because of vegetative propagation and hence the effect of drought is more pronounced in black pepper. Selective fertilization technique by artificially imposing desired selection pressure during pollination and fertilization is an effective and simple alternative in developing high yielding water stress tolerant black pepper hybrids. Hence, this experiment was done to identify the critical water potential as the selection pressure for male gametophytic selection in black pepper. The critical water potential for pollen germination in black pepper was -0.3 MPa. The ability of pollen to germinate and grow well at critical water potential could be used as a tool to identify water stress tolerance in black pepper cultivars.

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