TY - EJOU
AU - Anwar, Md. Parvez
AU - Khalid, Md. Ariful Islam
AU - Islam, A. K. M. Mominul
AU - Yeasmin, Sabina
AU - Ahmed, Sharif
AU - Hadifa, Adel
AU - Ismail, A.
AU - Hossain, Akbar
AU - Sabagh, Ayman EL
TI - Potentiality of Different Seed Priming Agents to Mitigate Cold Stress of Winter Rice Seedling
T2 - Phyton-International Journal of Experimental Botany
PY - 2021
VL - 90
IS - 5
SN - 1851-5657
AB - Seed priming has proved to be an effective pre-germination seed invigoration technique for different crops to
improve seed and seedling performance under different abiotic stresses. In Bangladesh, winter rice is very often
exposed to cold waves just after sowing in the nursery bed resulting in poor seed germination and seedling emergence, yellowish and thin seedlings production, and a very low survival rate. Seed priming may mitigate the cold
stress during seed germination and seedling emergence and helps in the quality seedling production of winter rice.
To evaluate the efficacy of different seed priming techniques in increasing seedling emergence, growth, vigor and
survivability of winter rice cultivars under cold stress, a pot experiment was conducted at the Department of Agronomy, Bangladesh Agricultural University during December 2018 to January 2019. The experiment comprised
two factors, (A) Winter rice variety namely, i) BRRI dhan29 and ii) BRRI dhan36; (B) Seed priming agent namely
i) Control (no priming), ii) 20000 ppm NaCl, iii) 30000 ppm NaCl, iv) 20000 ppm KCl, v) 30000 ppm KCl, vi)
20000 ppm CaCl2, vii) 30000 ppm CaCl2, viii) 50 ppm CuSO4, ix) 75 ppm CuSO4, x) 10000 ppm ZnSO4, xi)
15000 ppm ZnSO4, xii) 2 ppm Na2MoO4, xiii) 3 ppm Na2MoO4, xiv) 100 ppm PEG (Polyethylene glycol
4000) and xv) 150 ppm PEG. Seeds were sown on two different dates viz., 1st December and 1st January so that
seedlings are exposed to cold stress at different stages. The experiment was laid out in a completely randomized
design (CRD) with three replications. Results indicated that (in most of the cases) seed priming has a positive
impact on seedling emergence rate (%), root length, shoot length, root shoot ratio, root dry weight, shoot dry
weight, seedling dry weight and survival rate (%). Among the priming agents, KCl and CaCl2 performed best;
while priming with NaCl and PEG showed no advantages over no priming for both the sowing dates. In general,
BRRI dhan36 performed better than BRRI dhan29 in terms of seedling growth because of its higher tolerance to
cold stress. But, both the varieties performed similarly in terms of emergence rate and survival rate. Thus, priming
is an effective tool to increase seed germination, better seedling growth, and higher seedling survivability of winter
rice under cold stress, and KCl (20000 ppm) or CaCl2 (20000 ppm) can be considered as a viable priming agent.
KW - Seed invigoration; seedling emergence; seedling mortality; seedling growth; low temperature stress
DO - 10.32604/phyton.2021.015822