DE NOVO INDUCTION OF ROOTING IN GUAVA AND JACKFRUIT THROUGH MACROPROPAGATION TECHNIQUES
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Date
2019-09-21
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UNIVERSITY OF AGRICULTURAL SCIENCES, GKVK BENGALURU
Abstract
Rooting is important in fruit crops like guava and jackfruit for quality planting
material production. But, by conventional methods, induction of rooting is difficult. In this
investigation, an attempt was made to induce de no rooting in guava varieties like Arka
Kiran and Arka Mridula and in jackfruit varieties like Gumless and Tubugere-1 through
macropropagation methods. In these fruit crops, root induction was done using four
different PGPR strains like AR1, AR2, AR3 and AR1000 and different combinations
PGPR and hormone treatments was used. Out of the four PGPR strains PGPR strain AR
1000 was found to be better in inducing roots. Out of different hormones used, IBA and
NAA were found to be better in inducing roots and AR 1000 in combination with IBA also
gave good results in both guava and jackfruit. Shoot tip micrografting was done onto
already established rootstocks. Softwood grafting method was also undertaken in guava
and jackfruit varieties which gave us very good results. We obtained adventitious rooting
in all the selected treatments.