VARIATION IN PHYSICAL CHARACTERISTICS OF POD AND SEED ABORTION IN OROXYLUM INDICUM (L) BENTH.; A POTENTIAL MEDICINAL PLANT OF WESTERN GHATS, INDIAVikas Kumar, Manjunatha, M., Shimpi Chourasia and Sandeep Rout
Oroxylum indicum (Family: Bignoniaceae) is one of the medicinal tree species of deciduous forest that are distributed in South-East Asia. Number of seeds per pod of 0.01-0.04, 0.04-0.07 and 0.07-0.10 Kg of these weight classes was 262.00±243.01, 223.00±46.81 and 216.25±34.70 respectively. Higher weight (0.09 kg), length (47 cm) and breadth (6.80 cm) was highest value was recorded in the large class and which decreased from with decrease in weight class. Maximum fertile (105.67) and minimum non fertile (57) seeds were reported in medium weight class pods and the maximum (80.33) undeveloped seeds were reported in large size class pods. Maximum per cent of fertile seeds (50.73±25.09) and minimum per cent non fertile seeds (26.70±10.79) were recorded in medium size class. In case of large size class the length and breadth of pods was very strongly correlated. Meanwhile, strong negative correlations were exists between the weight and total number of seeds per pod and there exist very weak correlation among the length and breadth of seeds. There are several factors that responsible for seed abortion in tropical trees like lack of pollen germination, reduced fertilization, post-fertilization seed abortion, difference in time of fertilization and competition for maternal resources within a pod. Quality planting stock production is the major constraint of any tree planting programmes. A better understanding of pod size variation will give an edge to nursery man to produce superior quality seedlings.
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