Volume No. 10 Issue No.: 1 Page No.: 47-53 July-September 2015

 

INFLUENCE OF TEMPERATURE ON POLLEN VIABILITY AND FRUIT SETTING IN MANGO

 

Patel Gaurang D. *, Patel B. N. and Chauhan D. A.

Regional Horticultural Research Station, ASPEE College of Horticulture and Forestry, N.A.U., Navsari, Gujarat (INDIA)

 

Received on : March 20, 2015

 

ABSTRACT

 

Mango yield is highly affected due to sudden cold snap during flowering phase during 2010-11. The response of flowering and pollen viability to low temperature regimes was studies to determine the suitable condition for the pollen fertility and fruit setting in Kesar, Alphonso and Rajapuri varieties of mango under South Gujarat condition. The study was carried out at Regional Horticultural Research Station, ASPEE College of Horticulture and Forestry, N.A.U., Navsari during 2011-12. The First phase (D1 : flower emergence before 31st Jan-2012 and anthesis during 5 to 11 Feb-2012) was most sensitive to the degrees (minimum temperature<10 C), as well as mean difference of day and night temperature (>20 C) during 7 to 10th Feb-12 resulted in pollen grains had a low fertility (<50%). Temperature between 15 and 33 C during the 2nd phase (D2: flower emergence after 31st Jan-2012 and anthesis during 19 to 25th Feb-2012) was optimum for pollen fertility (85-90% pollen viability). Analysis of field records showed a positive correlation between percentage of pollen fertility, fruit setting and mean night temperature (<12 C) during the period of anthesis. In case of panicle size and number of flowers (male, hermaphrodite and total) was observed significantly maximum in cv. Alphonso during the First phase. In all three cultivars, the maximum fruit setting at grain, pea and marble stage were noted in flowers anthesis during the second phase. Thus, all three cultivar under study performed best during second phase of anthesis (exposure to temperature above 12 C).

 

Keywords : Mango, Temperature, Flowering, Pollen viability, Fruit setting

 

 

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