Impact of Bioregulatorson Biochemical Parameters in cuttings of Passion fruit [Passiflora edulis flavicarpa Deg.]

Passion fruit through seed propagation is showing good performance but due to high vaiability
and heterozygosity which result in uneven plants in orchard. Also plant raised through seed takes
more time to grow than vegetatively propagated. Therefore by considering the importance of
propagation by stem cuttings, a present investigation was conducted on the response of different
bioregulators on biochemical parameters in cuttings of the Yellow passion fruit variety
[Passiflora edulis flavicarpa Deg.]. The cuttings of passion fruit were treated with various
concentrations of Indole butyric acid [300, 500 and 700 ppm] and Paclobutrazol[20, 40 and 60
ppm]for 15 minutes under quick dip method along with control [distilled water]. Cuttings consist
of 3-4 nodes and are approximately 15-20 cm in length. The results obtained from the study
revealed that significantly higher concentrations of chlorophyll a [4.25 mg/g], chlorophyll b
[1.02 mg/g], total chlorophyll [5.27 mg/g], carotenoid concentration [1.06 mg/g] and total
soluble sugar [3.07 mg/g] when cuttings were subjected to T1 PBZ @ 60 ppm. Among the IBA
treatments, 700 ppm was recorded best concentration in biochemical parameters viz., chlorophyll
a [3.07 mg/g], chlorophyll b [0.78 mg/g], total chlorophyll [3.85 mg/g], carotenoid concentration
[0.65 mg/g] and total soluble sugar [2.87 mg/g].