Mapping of F. moniliforme var. subglutinans from normal and malformed panicles and seedlings of mango by recovery method.
Kumar P., Misra A. K., Srivastava A. K., Modi D. R.
Author Affiliation: Central Institute for Subtropical Horticulture, Lucknow - 227 107, U.P., India.
Plant Archives 11 : 567-569
Abstract : F. moniliforme var. subglutinans (Fms) colonies were isolated from different portions of the normal and malformed panicles for the mapping/recovery. It was found that the Fms colonies were recovered both from normal as well as malformed panicles. It was significant to note that it's per cent recovery of F. moniliforme var. subglutinans significantly lower in normal panicles compared to malformed panicles. In below base portion of the panicles, while the Fms colonies were 33.33 per cent in normal panicles, it was 56.66 per cent in malformed panicles. It was inferred from the data that while 56.66 per cent population below base in the panicle could cause symptom production of malformation, 33.33 per cent population could not cause malformation. The threshold level above about 50 per cent in the below base portion may be responsible for the cause of the malformation. Mapping of F. moniliforme var. subglutinans population was also done in the entire vegetative malformed seedling. Seedlings were divided into six portions i.e. root, base of the shoot, middle portion of the main shoot, joint portion of lateral branches, lateral branch, top of the branch and isolations were done for the recovery of Fms colonies. It was found that Fms were isolated from root portion also, though it's recovery per cent only 8. The population increased in the upper portions and at the base of the shoot, it was 16 per cent, while it significantly increased in the upper portions. It was also interesting to note that in vegetative malformed portion it's population was above 64 per cent.