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Physiological response of sorghum (Sorghum bicolor L.) genotype (HJ 513) against the foliar application of salicylic acid (SA) under salt stress was studied. Present investigation was carried out to evaluate the role of SA in mitigating the adverse effect of salt stress. Experiment was conducted in pots under screen house conditions. Salt stress wa...
Context in source publication
Context 1
... genotype (HJ 513) treated with salt stress (Fig 3) (control, 5, 7.5 and 10 dS m -1 ), showed significant decrease in plant height ( Fig. 1 A), fresh and dry weight ( Fig. 1 B and C), leaf area (Fig, 1 D) and leaf number (Fig. 1 E) with the increasing levels of salt stress. For example percent reduction in plant height (74%), fresh weight (81.1%), dry weight (87.7%), leaf area (92.3%) and leaf number (50%) was found highest at 10dS m -1 of salt stress. ...
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Citations
... Salicylic acid treatment was also found to reduce the detrimental effects of salinity stress on the development of two wheat cultivars: 'PAN3497' and 'SST806' (Abdi et al., 2022), mainly through glycine betaine (GB) accumulation. Additionally, SA is also reported to lessen the effects of drought on rice and sorghum by maintaining the plant's water status (Jangra et al., 2019;Liu et al., 2022). In ginger plantlets exposed to salt stress, SA enhanced the ion balance and strengthened the antioxidant system (Hundare et al., 2022). ...
Background and Objective:
Black rice, ‘Sembada Hitam’, has become popular as a functional food because it contains anthocyanin and other minerals. Salicylic acid (SA) can sustain plants and help them grow better under environmental stresses, including salinity. This research was conducted to evaluate the effect of SA applied as seed priming on the germination and early seedling growth of rice under salinity.
Methodology:
The design of this experiment was 4 × 4 factorial in a completely randomized design. The first factor was levels of the NaCl, namely 0 (control), 50, 100, and 150 mM. The second factor was different levels of SA, namely 0 (control), 0.5, 1, and 2 mM. The rice seeds were soaked in SA for 24 hours, and then placed in a medium containing NaCl. Twenty rice seeds were germinated with three replicates. Seed germination was monitored daily for a week, germination rate index (GRI), number of roots, root length, shoot length, fresh weight, dry weight, and seedling vigor index (SVI) were determined on the 15th day.
Main Results:
The results revealed that salinity inhibited seed germination and seedling growth. The elevated concentrations of NaCl caused the lower germination percentage (GP) and the early growth of seedlings. The adverse effects of salinity were ameliorated in those seeds primed with SA. Seed primed with 0.5 mM SA showed the highest GP under 100 mM NaCl of 80 ± 2.53% (P < 0.001). While 1 mM of SA under 50 mM NaCl possesses the highest shoot length (13.63 ± 0.12 cm; P < 0.001) and fresh weight (86 ± 0.001 mg; P < 0.001). Primed with 2 mM SA under 150 mM NaCl had a lower GP of 28.33 ± 7.64% than those primed with SA of 0.5 mM or 1 mM with GP of 45 ± 5% and 43.33 ± 7.64%, respectively.
Conclusions:
Seeds priming with 1 mM SA positively affected germination and early seedling growth of ‘Sembada Hitam’ black rice subjected to salinity and it is recommended as an appropriate concentration for ameliorating adverse effects of salinity.Keywords: Germination percentage, salicylic acid, salt stress, seed priming, seedling growth, Sembada Hitam
... Sorghum is moderately salt tolerant crop and experimental observation under salt stress showed declining growth and days to 50 % flowering varied in different genotypes. This decline in growth of plants was accompanied by decrease in water status, chlorophyll content, K + and Ca 2+ whereas Na + content increased with the augmentation of salt stress (Dashti et al., 2009, Jangra et al., 2019. ...
To evaluate the responses of oat genotypes to rising salinity, we studied plant growth, plant water status, membrane injury, chlorophyll
content and photosynthetic rate at 50 and 100 mM of salt stress. Genotypes were grown in pots under screen house conditions and measured
physiological parameters at 50% flowering. Most of the parameters declined with the increment of salt stress. Reduction in fresh weight (g),
relative water content (%) was noticed from control to 100 mM of salt stress and the values ranged from 36.78 to 9.30g, 84.20 to 40.53,
respectively. Similarly, total chlorophyll content (mg g-1 FW), chlorophyll content (SPAD units), chlorophyll stability index (CSI %) and
photosynthetic rate (µmol CO2 m
-2s
-1) also declined to greater extent at higher salinity (100 mM). The utmost chlorophyll content was
observed in HJ-8 (1.18) followed by HFO-611 (1.18), OS-377 (1.06), HFO-505 (1.06) genotypes at 100 mM of salt stress. Similar trend was
observed for chlorophyll stability index (CSI) and chlorophyll content (SPAD units). Declining trend was also noticed in photosynthetic rate
(µmol CO2 m
-2
s
-1) and the values varied from 5.99 to 2.21 from control to 100 mM of salt stress. Three genotypes (HFO 427, HFO 818 and
HFO 525) did not survive at higher (10 mM) salt stress. In nutshell, the oat genotypes HJ-8, OS-377 and HFO-505 performed
physiologically superior than others under salt stress. Present findings may endow with original impending into the potential responses associated with ever-increasing salt stress in oat genotypes.
