Abstract
Water deficit consider as one of the abiotic factors controlling growth and limiting wheat yield, through affecting on the physiological and biochemical processes within the plant tissues. Two field experiments were carried out in order to investigate the effect of rates from stress defense substances [Jasmonic acid (JA) and Lithovit (Li)] on growth, physiological traits, chemical constitutes and yield of wheat plants (Gemmeiza 11 cultivar) under three water regimes (100, 75 and 50% ETc) at Experimental Farm, Faculty of Agriculture, Menoufia University, Shebin El-Kom, Egypt during the two growing winter seasons of 2016/2017 and 2017/2018. Exposing plants to water deficit levels (75% and I 50% ETc) decreased in all growth characters studied, water relations (total water content, relative water content, osmotic pressure, transpiration rate and plasma membrane integrity), photosynthetic pigments, chemical composition (total carbohydrates, total soluble sugars, N and K) as well as yield and its components (number of spikes/ m2, number of grains /spike, spike weight, 1000-grain weight, grain yield /fed and straw yield /fed) in comparison with well-watered plants (Control, 100 ETc). However, plants grown under severe water stress (I 50% ETc) recorded highest activities of peroxidase, phenoloxidase and increased proline content.Application of JA and lithovit combinations showed an additive effects on increasing all characters studied except transpiration rate, plasma membrane integrity, activities of peroxidase and phenoloxidase as well as proline content compared to untreated plants. Application rate 10 ppm JA + 5% lithovit surpassed most of the other tested characters studied in both growing seasons. The interactions between water regimes and stress defense substances (JA and Li) were found to be significant for most studied traits. Wheat grown under normal irrigation integrated with application of 10 ppm JA + 5% lithovit generally produced the highest values of growth, photosynthetic pigments as well as yield and its components. Moreover, application of 10 or 20 ppm jasmonic acid + 5% lithovit under water stress conditions led to an increase in all vegetative growth characters, water relations (total water content, relative water content and osmotic pressure), photosynthetic pigments, chemical composition of the leaves (total carbohydrates and total soluble sugars contents, N and K percentages) as well as yield and its components, while caused a significant decrease in transpiration rate, plasma membrane integrity, proline, activities of peroxidase and phenoloxidase enzymes. It could be recommended that application of JA integrated with lithovit (10 ppm JA + 5% Li) under water deficit conditions led to mitigate the adverse effects of drought stress and increased growth and productivity of wheat.
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Claims 9
Claim · model-written summary
Water deficit reduced wheat growth, water relations, pigments, composition and yield compared with well-watered plants.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- water deficit levels (75% and I 50% ETc)e0
- Outcome
- all growth characters studiede0
- Direction
- decreasede0
- Comparator
- well-watered plants (Control, 100 ETc)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exposing plants to water deficit levels (75% and I 50% ETc) decreased in all growth characters studied, water relations (total water content, relative water content, osmotic pressure, transpiration rate and plasma membrane integrity), photosynthetic pigments, chemical composition (total carbohydrates, total soluble sugars, N and K) as well as yield and its components (number of spikes/ m2, number of grains /spike, spike weight, 1000-grain weight, grain yield /fed and straw yield /fed) in comparison with well-watered plants (Control, 100 ETc).”
t0“Wheat”
Claim · model-written summary
Severe water stress increased peroxidase and phenoloxidase activity and proline content.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- severe water stress (I 50% ETc)e0
- Outcome
- activities of peroxidase, phenoloxidase and increased proline contente0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants grown under severe water stress (I 50% ETc) recorded highest activities of peroxidase, phenoloxidase and increased proline content”
t0“Wheat”
Claim · model-written summary
Combined JA and Lithovit increased most measured traits relative to untreated wheat.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- JA and lithovit combinationse0
- Outcome
- all characters studied except transpiration rate, plasma membrane integrity, activities of peroxidase and phenoloxidase as well as proline contente0
- Direction
- increasinge0
- Comparator
- untreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of JA and lithovit combinations showed an additive effects on increasing all characters studied except transpiration rate, plasma membrane integrity, activities of peroxidase and phenoloxidase as well as proline content compared to untreated plants.”
t0“Wheat”
Claim · model-written summary
The 10 ppm JA plus 5% Lithovit treatment surpassed most other treatments.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 10 ppm JA + 5% lithovite0
- Outcome
- surpassed most of the other tested characters studiede0
- Direction
- surpassede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application rate 10 ppm JA + 5% lithovit surpassed most of the other tested characters studied in both growing seasons.”
t0“Wheat”
Claim · model-written summary
Water regime and stress defense substance interactions were significant for most traits.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- water regimes and stress defense substances (JA and Li)e0
- Outcome
- most studied traitse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interactions between water regimes and stress defense substances (JA and Li) were found to be significant for most studied traits.”
t0“Wheat”
Claim · model-written summary
Normal irrigation with 10 ppm JA plus 5% Lithovit generally gave the highest growth, pigment and yield values.
- Taxon
- WheatTriticum aestivume0
- Treatment
- normal irrigation integrated with application of 10 ppm JA + 5% lithovite0
- Outcome
- growth, photosynthetic pigments as well as yield and its componentse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat grown under normal irrigation integrated with application of 10 ppm JA + 5% lithovit generally produced the highest values of growth, photosynthetic pigments as well as yield and its components.”
Claim · model-written summary
Under water stress, JA plus Lithovit increased wheat growth, water status, pigments, leaf composition and yield.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 10 or 20 ppm jasmonic acid + 5% lithovit under water stress conditionse0
- Outcome
- all vegetative growth characters, water relationse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of 10 or 20 ppm jasmonic acid + 5% lithovit under water stress conditions led to an increase in all vegetative growth characters, water relations (total water content, relative water content and osmotic pressure), photosynthetic pigments, chemical composition of the leaves (total carbohydrates and total soluble sugars contents, N and K percentages) as well as yield and its components”
t0“Wheat”
Claim · model-written summary
Under water stress, JA plus Lithovit decreased transpiration, membrane integrity, proline and oxidase activities.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 10 or 20 ppm jasmonic acid + 5% lithovit under water stress conditionst1
- Outcome
- transpiration rate, plasma membrane integrity, proline, activities of peroxidase and phenoloxidase enzymese0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while caused a significant decrease in transpiration rate, plasma membrane integrity, proline, activities of peroxidase and phenoloxidase enzymes.”
t0“Wheat”
t1“application of 10 or 20 ppm jasmonic acid + 5% lithovit under water stress conditions”
Claim · model-written summary
The authors recommend 10 ppm JA plus 5% Lithovit during water deficit to improve wheat productivity.
- Taxon
- wheatTriticum aestivume0
- Outcome
- application of JA integrated with lithovit (10 ppm JA + 5% Li) under water deficit conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It could be recommended that application of JA integrated with lithovit (10 ppm JA + 5% Li) under water deficit conditions led to mitigate the adverse effects of drought stress and increased growth and productivity of wheat.”
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