The sensitivity of rice plants to salinity is a major challenge for growth and productivity in the salt-affected lands. Priming seeds biostimulants with stress-alleviating potential an effective strategy improve tolerance rice. However, mechanisms action these compounds are not fully understood. Herein, impact priming (cv. Giza 179) 100 mg/L humic acid on its underlaying physiological processes under increased magnitudes (EC = 0.55, 3.40, 6.77, 8.00 mS/cm) during critical reproductive stage...

Abstract High-yielding rice cultivars exhibit a great performance in non-saline fields; however, their growth and productivity are greatly reduced salt-affected lands. Humic acid has promising stress-mitigating potential can be effective improving salt tolerance salinity sensitive cultivars. Herein, seeds of Giza 177 (high-yielding but salt-sensitive cultivar) were primed 40 mg/l humic acid, sown, maintained. Then physiological responses the acid-primed plants to increased levels (EC: 0.55,...

Abstract Background Drought is a major determinant for growth and productivity of all crops, including cereals, the drought-induced detrimental effects are anticipated to jeopardize world food security under ongoing global warming scenario. Biostimulants such as humic acid (HA) can improve drought tolerance in many maize sorghum. These two plant species genetically related; however, more susceptible than The physiological biochemical mechanisms underlying differential responses water...

Abstract Background Salinity is a major threat to rice growth and productivity. Utilizing wild rice-derived genes biostimulants with high promoting- stress-alleviating potential can significantly improve salinity tolerance in cultivated rice. Herein, we investigated the vegetative physiological responses of Giza 177 ( Oryza sativa , sensitive, high-yielding cultivar) promising introgression salt tolerant line sativa/glaberrima ; SG 65) from population × African glaberrima ) under low (2.75...

The effects of drought on growth, pigments and 14 CO 2 assimilation were studied in three sorghum cultivars. Water stress applied either at the vegetative or reproductive stage was found to reduce relative growth net rates. Root less affected by water certain cases it increased; consequently, root/shoot ratio improved. sensitivity greater than stage. Dorado most drought‐tolerant Giza 15 least cultivar, as determined calculation susceptibility index for total green leaf area shoot dry weight....

S ummary The export and translocation of radioactivity supplied as 14 C‐auxin or a C‐kinin to donor leaf cocoa was followed at different stages the flush cycle see whether there any correlation between pattern movement these growth promoters apical bud activity. auxin 3‐indole (1‐ C) acetic acid, ( C‐IAA), cytokinin, 6‐benzyI‐amino (8‐ purine, C‐BAP), were introduced into plant by foliar feeding. Export derived from C‐IAA predominantly basipetal all cycle. Most tracer accumulated in lower...

A pot experiment was conducted to evaluate the beneficial effect of grain presoaking in spermine (0.15 mM), spermidine (0.3 mM) and their interaction with waste water (25%, 50%, 100%) polluted heavy metals on yield biochemical aspects yielded grains wheat plants (Triticum aestivum L.) variety Sakha 94. Irrigation decreased significantly all components (100 kernel weight, yield/plant, straw mobilization crop indices) use efficiency. On other hand, polyamines appeared ameliorate harmful...

S ummary The flush leaves of seedling cocoa plants were assessed at each stage the cycle from leaf unfolding to maturity for differences in lamina presentation angle, surface hairs, stomatal number and development cuticle thickness. Changes these parameters then correlated with cuticular diffusive resistance leaves. It is suggested that perpendicular positioning young leaves, presence rapid synthesis limited during early stages expansion, restrict water loss developing Maximum rate a new was...

S ummary The dormant phase of the flush cycle leaf growth in cocoa is known to be correlated with high abscisic acid (ABA) levels mature leaves new (NF) and previous (PF) leaves. Defoliation either NF or PF seedlings reduced length cycle, thus showing that were a source inhibitors which could affect shoot apical activity. application ABA led an extension phase, whereas zeatin gibberellic decreased it. distribution [ 14 C]ABA following its at different stages throughout showed C] was...

Salinity stress is a major constraint for rice growth and productivity. Rice cultivars with considerable salt tolerant capabilities have been developed improving their performance in the salt-affected lands crucial. Herein, effects of humic acid (100 mg/l) as stress-alleviator biostimulant on germination, vegetative growth, yield Giza 179 cultivar under increased salinity (0.55, 3.40, 6.77, 8.00 mS/cm) were investigated. The acid-induced also validated field. retarded germination-related...

THIS STUDY evaluated the impact of cobalt (Co) nutrition at optimum concentration on growth and oxidative stress in two Egyptian rice varieties (Sakha 104 Giza 178) under drought stress. The was applied different irrigation intervals (six eight days), after four days set as control through reproductive stage. roots shoots parameters (lengths, fresh dry weights), biomarkers; membrane injury, lipid peroxidation, proline accumulation, protein content, total phenols, flavonoids contents, along...

The objective of this study was to investigate the effect soil drench with three different concentrations CdCl2 on growth criteria, ions content and water relations Sorghum bicolor plants. Also particular interest focused grain presoaking kinetin in order ameliorate toxicity effects exerted by levels CdCl2. In general, results showed, that observed suppression criteria (i.e. root length, fresh dry weights, plant height, shoot cumulative leaf area as well root/shoot ratio), K+, Na+, Ca2+...

The objective of this study was to investigate the effect soil drench with three different concentrations CdCl2 on pigments content, photosynthetic activity, carbohydrate contents and productivity Sorghum bicolor L. cv. 'Dorado' plants throughout various stages plant growth development. Also particular interest focussed grain presoaking kinetin ameliorate toxicity effects exerted by levels CdCl2. In majority cases, pretreatment increased pigments, Hill reaction as well in leaves cadmium...