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Raja, K.
- Infusing Microbial Consortia for Enhancing Seed Germination and Vigour in Pigeonpea (Cajanus cajan (L.) Millsp.)
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PDF Views:70
Authors
Affiliations
1 Department of Seed Science and Technology, Tamil Nadu Agricultural University, Coimbatore 641 003, IN
2 Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore 641 003, IN
3 Agricultural College and Research Institute, Tamil Nadu Agricultural University, Kudumiyanmalai 622 104, IN
1 Department of Seed Science and Technology, Tamil Nadu Agricultural University, Coimbatore 641 003, IN
2 Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore 641 003, IN
3 Agricultural College and Research Institute, Tamil Nadu Agricultural University, Kudumiyanmalai 622 104, IN
Source
Current Science, Vol 117, No 12 (2019), Pagination: 2052-2058Abstract
Use of plant growth promoting bacteria for seed treatment is in trend nowadays as it is beneficial to the plants and environment. But, carrier-based inoculants have short shelf life and difficult to use for large quantities of seed. Therefore, in the present study we used liquid microbial cultures for seed infusion in pigeonpea and assessed their compatibility with seed treating chemicals. The results showed that the soaking of pigeonpea seeds in liquid cultures like pink pigmented facultative methylotroph (PPFM) @ 1 : 100 dilution for 3 h or Rhizobium or phosphobacteria @ 1 : 50 dilution for 4 h have showed increased germination and vigour. In the microbial infused seeds, Rhizobium (13 × 104 cfu g–1 of seed) and phosphobacteria (20 × 104 cfu g–1 of seed) populations observed, were slightly reduced during three months storage. Nevertheless, the population was drastically reduced in PPFM (11 × 104 to 2 × 104 cfu g–1 of seed). Conversely, PPFM has performed better in seed quality enhancement amongst cultures. Also, consortia of Rhizobium @ 1 : 50 dilution + PPFM @ 1 : 100 dilution (1 : 1) for 3 h increased seed vigour with better microbial populations (14 × 104 and 2 × 104 cfu g–1 of seed). Also, seed infusion with PPFM liquid culture @ 1 : 100 dilution for 3 h followed by polymer coating @ 5 ml kg–1 + carbendazim treatment @ 2 g kg–1 of seed recorded increased germination and vigour with the PPFM population of 1 × 104 cfu g–1 of seed.Keywords
Pigeonpea, PPFM, Phosphobacteria, Rhizobium, Seed Germination, Vigour.Full Text
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- Influence of Gibberellic Acid on Seedlessness in Jamun (Syzygium cumini L. Skeels)
Abstract Views :176 |
PDF Views:80
Authors
K. Raja
1,
M. S. Aneesa Rani
1
Affiliations
1 Vegetable Research Station, Tamil Nadu Agricultural University, Palur 607 102, IN
1 Vegetable Research Station, Tamil Nadu Agricultural University, Palur 607 102, IN
Source
Current Science, Vol 121, No 12 (2021), Pagination: 1619-1622Abstract
An experiment was conducted using jamun to assess the physiology of seedless fruit formation. Seedless jamuns have higher content of gibberellic acid (GA3) (0.876 mg g-1) than seeded fruits (0.461 mg g-1) produced in the seedless genotype. Consequently, GA3 at 100 ppm was sprayed over the jamun trees that resulted in 99.5% seedless fruit production, which was higher than the unsprayed control (72.6%). Also, the application of GA3 at 300 ppm resulted in 36.4% seedless fruit formation in the seeded genotype. In corroboration with embryo abortion by GA3, the fruits sprayed with the latter at 100 ppm were analysed for their GA3 content. The results indicated that GA3 content was highest (5.609 mg g-1) in these fruits when compared to control (0.683 mg g-1)Keywords
Fruit Production, Growth Hormone, Gibberellic Acid, Jamun, Seedlessness.Full Text
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