INFLUENCE OF PRE-SOWING SEED TREATMENTS ON GERMINATION AND ITS PARAMETERS IN INDIAN SCREW TREE (Helicteres isora L.) 3615
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Date
2022-09
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JAU JUNAGADH
Abstract
The present investigation was conducted under laboratory in the Department of
Genetics and Plant Breeding, College of Agriculture, Junagadh Agricultural
University, Junagadh during late rabi 2020-21 with an aim to study the influence of
various pre sowing treatments viz., hot water treatments H1 (550C for 10 min), H2 (550C
for 20 min), H3 (700C for 10 min), H4 (700C for 20 min) and hormone treatments [T1
(GA3 @ 50 ppm), T2 (GA3 @ 100 ppm), T3 (GA3 @ 150 ppm), T4 (IBA @ 50 ppm), T5
(IBA @ 100 ppm) and T6 (IBA @ 150 ppm) and along with the control (C0)] on seed
germination and its parameters in Indian screw tree (Helicteres isora L.). The
characters viz., germination per cent, days taken for initiation of germination (DTIG),
days taken for completion of germination (DTCG), speed of germination, root length
of seedling (cm), shoot length of seedlings (cm), seedling length (cm), collar diameter
(mm), seedling fresh weight (mg), seedling dry weight (mg), seedling vigour index
(length) and seedling vigour index (mass) were analyzed by completely randomized
design (factorial).
The analysis of variance for seed germination and its parameters revealed that
hot water and hormonal treatments and also interaction of hot water and hormone
manifested significant differences for seed germination and all its parameters that were
studied.
The treatment 700C for 10 min (H3) produced significantly the lowest values
for days taken for initiation of germination (3.99 days), days taken for completion of
germination (9.72 days) and highest values for seedling fresh weight (28.10 mg) and
seedling dry weight (3.09 mg) whereas, the highest germination per cent (21.39%),
speed of germination (1.36), root length (0.65 cm), shoot length (4.29 cm), seedling
length (4.94 cm), collar diameter (0.164), seedling vigour index (length) (105.66) and
seedling vigour index (mass) (65.66) were found significantly the highest in 700C for
20 min (H4).
Seeds treated with GA3 @ 100 ppm (T2) produced significantly the highest
germination per cent (17.41%), speed of germination (1.25), root length (0.64 cm),
shoot length (4.06 cm), seedling length (4.70 cm), seedling vigour index (mass) (52.23)
and seedling vigour index (length) (81.82). Significantly the highest days taken for
completion of germination (11.25 days) was found in IBA @ 50 ppm (T4) whereas, the
highest collar diameter (0.166 mm), seedling fresh weight (28.07 mg) and seedling dry
weight (3.18 mg) were found in IBA @ 100 ppm (T5).
The treatment combination of H3T2 (hot water 700C for 10 min + GA3 @ 100
ppm) was found to be the highest in the days taken for completion of germination
(12.00 days) and speed of germination (1.57). The germination per cent (24.00%), days
taken for initiation of germination (3.00 days), shoot length (4.53 cm), seedling length
(5.20 cm), collar diameter (0.180 mm), seedling fresh weight (29.50 mg), seedling dry
weight (3.40 mg), seedling vigour index (length) (124.80) and seedling vigour index
(mass) (81.60) were found significantly the highest in H4T2 (hot water 700C for 20 min
+ GA3 @ 100 ppm) whereas, the highest root length (0.67 cm) was found in case of
H4T5 (hot water 700C for 20 min + IBA @ 100 ppm).
Overall, it can be concluded that hot water and hormonal treatments played an
important role on the seed germination and its parameters in Indian screw tree. Looking
to the seed germination percentage, the days taken for initiation of germination, shoot
length, seedling length, collar diameter, seedling fresh weight, seedling dry weight,
seedling vigour index (length) and seedling vigour index (mass) it is suggested that hot
water 700C for 20 min + GA3 @ 100 ppm for enhancement of germination and its
parameters in Indian screw tree