Consequences of Seed Priming with Salicylic Acid and Hydro Priming on Smooth Vetch Seedling Growth under Water Deficiency

Abstract

Due to low rainfall at early autumn, smooth vetch seedling growth in rain-fed lands often is limited by water deficit stress yet the data regarding the reactions of smooth vetch to water deficit at early growth stages are pretty rare. The objective of current study was to examine possibility of using priming treatments (hydro priming and priming salicylic acid) to alleviate the inhibitory effect of water deficiency during early growth of Smooth Vetch. In this respect, seeds were soaked in distilled water (hydro priming) or 0.5 mM solution of SA for 36 h at 10 °C then dried back to original moisture content. Pots were irrigated for 25 days at four levels of available water containing field capacity (FC), 75% FC, 50% FC and 25% FC. In general, seedling emergence and early growth were markedly limited by increasing water deficiency. However, priming treatments particularly with SA caused considerable improvement in either emergence or growth of seedlings (dry weight, length). The obtained results showed that primed samples exhibited higher accumulation of proline, glycine betaine (GB) under all levels of available water except 100% FC and also higher total soluble sugars (TSS) and trehalose under severe water deficit (25% FC). SA primed samples had higher relative water content especially under higher levels of water deficiency. The more balanced water status within SA primed samples also was accompanied with higher accumulation of proline and glycine betaine. There were significant differences between two priming treatments in terms of proline and GB content within seedlings and SA priming considerably increased proline and GB accumulation. In contrast to proline and GB, TSS and trehalose content wasn't influenced by SA treatment and both hydro and SA primed samples showed statistically similar quantities.

Hydropriming and Osmotic Priming Induce Resistance against Aspergillus niger in Wheat (Triticum aestivum L.) by Activating β-1, 3-glucanase, Chitinase, and Thaumatin-like Protein Genes

“…Of all the treatments, the hydro-and osmotic-primed plants showed the highest accumulation of RWCs (Figure 2A). The same results were reported by Namdari and Baghbani [79] and by Mahboob et al [80], who reported higher water content in Vicia dasycarpa and Zea mays with hydropriming and osmotic priming, respectively. Our findings revealed an increase in shoot and root length after priming compared to the control, which is supported by the findings of Dessalew et al [4] and Kumar and Rajalekshmi [81].…”

Stimulatory effect of hormonal seed priming in plant tolerance to resist abiotic stress

“…[87] Salinity Improved Na + /K + and maintaining membrane integrity [88] Safflower (Carthamus tinctorius) Drought Enhanced antioxidant enzyme activities and reduced oxidative damage [89] Maize (Zea mays) Chilling Increased α-amylase and antioxidant enzyme activities and endogenous SA content [90] Chilling Enhanced enzymatic antioxidant activities, high tissue water content [91] Lead Increased glycine betaine and nitric oxide content and regulation of gene expression [92] Chromium and UV-B Reduced the accumulation of chromium and ROS [93] Wheat (Triticum aestivum) Salinity Decreased the electrolyte leakage [94] Drought Balanced nutrient uptake [95] Osmotic Resistance to osmotic stress [96] Salinity Higher contents of photosynthetic pigments, soluble sugar, and protein [97] Boron toxicity Increased photosynthetic pigments [98] Cadmium Modulates nutrient relations and photosynthetic attributes [99] Smooth vetch (Vicia dasycarpa) Water deficit Higher accumulation of proline and glycine betaine [100] Okra (Abelmoschus esculentus) Chilling Enhanced antioxidant enzyme activities and membrane integrity [101] Sorghum (Sorghum bicolor) Drought Improved antioxidant defense system [102] Tomato (Solanum lycopersicum) Salinity Decreased salinity stress [103] Heat Increased lycopene content [104] Pumpkin Salinity Protein contents and nitrate reductase were increased [105] Faba bean (Vicia faba) Salinity Higher osmotic solute content, carotenoids, and antioxidant enzyme activity [106] drought stress and enhanced the vegetative growth of safflower (Carthamus tinctorius) [81]. Priming with salicylic acid at 100 mg L -1 enhanced emergence and produced early seedling growth in cucumber (Cucumis sativus) [82] and increased germination and productivity of Vicia faba [83] and sesame (Sesamum indicum) [84].…”

Seed priming by donors of gasotransmittees and compounds with hormonal activity: growth and stress-protective effects

“…Показано також підвищення схожості насіння моркви за низької температури (5 °C) [58]. Проростки кукурудзи, отримані з насіння, праймованого саліциловою кислотою, мали підвищену кількість сумісних осмолітів та вищий відносний вміст води, особливо при вирощуванні за умов дефіциту води [59]. Передпосівна обробка насіння проса саліциловою кислотою підвищувала урожайність рослин в польових умовах, а найпомітніший ефект спостерігався у роки з природною посухою та високою температурою у літній період [60].…”