PJB-2023-98
INVIGORATIVE POTENTIAL ASSESSMENT OF PRIMING AGENTS THROUGH GERMINATION AND VARIOUS SEEDLING ATTRIBUTES OF ARTIFICIALLY AGED SEEDS IN CARROT (DAUCUS CAROTA L.)
Uzma Arif
Abstract
Decline in seed viability is a common phenomenon that continues even under ideal storage conditions and seed with low viability in genebanks is an important issue that needs special efforts to conduct seed invigoration studies. The comparative invigorative potential of KNO3, NaCl, KH2PO4, PEG, salicylic acid, ethanol, GA3 and etheral alone as well as in certain combinations was investigated in artificially aged carrot seed. The comparison of the diverse priming agents when used alone it was observed that GA3 remained at top revealing 91.4% improved germination over control that was followed by KNO3 improving 65% germination. With minor deviations, rest of the parameters viz. shoot length, root length, fresh and dry seedling bio-mass also supported the similar pattern. On the other hand, KNO3 when applied in combination with NaCl, salicylic acid, KH2PO4, PEG and ethanol, it was noted that its combination with NaCl and KH2PO4, revealed improved germination revealing 6.7% and 20.4% over control, respectively. Although, the combined use of invigorants showed improved germination over control, but it was either low or at par with their single use. Rest of the combination did not perform better than control. Salicylic acid was the only chemical compound that neither alone nor in-combination has shown any invigorative potential in carrot seeds and proved to be deleterious as no germination was recorded with this compound. KNO3 was the most diverse invigorant alone or in-combination, mostly recording positive or synergistic effect with some exceptions.
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