Abstract
Under the water stress condition, active photosynthetic function of different assimilating organs and mainly of an ear, together with an optimal architectonics of plants play a decisive role in yield formation. In drought tolerant intensive varieties more than 60% of grain formation and protein synthesis occurs by an account of ear photosynthesis. Depending on a value of ear photosynthesis and tolerance of plants under strong drought conditions, the genotypes accumulate 35-70% of proteins from their contents in plants under the normal water supply. C4-cycle enzymes (PEP-carboxylase, NAD- and NADP-malate dehydrogenase) in C3-plants play a certain role in their adaptation to stress. High-yielding wheat genotypes tolerant to water stress have high activity of C4-cycle enzymes in the leaves and elements of ear; under the water stress the C4-cycle enzymes are activated. High- productive genotypes differ by the high intensity of CO2 assimilation and by the rate of photorespiration. The value of ratio of true photosynthesis to photorespiration in the leaves and in ear elements in genotypes with various rate of CO2 assimilation are close and equal at an average to 3:1 with increase of the given ratio in intensive genotypes. Thus, it is possible to denote the parallel increase of the intensity of true photosynthesis and photorespiration in ontogenesis of leaves and therefore the attempt to reduce photorespiration with the purpose of increase of the productivity is inconsistent. By increasing of a tolerance of genotypes to water stress or with increasing of drought the rate of photorespiration decreased in a large degree in the elements of ear. As a matter of investigation the series of genotypes with high activities of the primary processes and photosynthetic CO2 metabolism under water stress, having the appropriate morphophysiological characters were revealed. Using of these genotypes with main photosynthetic parameters connected with an intensity of ear activity and with activities of other non-leaf organs and high productivity of a grain protein is the base of creation of high tolerant varieties.
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Claims 14
Claim · model-written summary
In drought tolerant intensive wheat varieties, ear photosynthesis accounts for more than 60% of grain formation and protein synthesis.
- Taxon
- Wheat
Triticum aestivumt0 - Material
- drought tolerant intensive varietiese1
- Organ / stage
- eare1
- Outcome
- grain formation and protein synthesise1
- Value
- more than 60%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Organs of Wheat Genotypes”
e1“In drought tolerant intensive varieties more than 60% of grain formation and protein synthesis occurs by an account of ear photosynthesis”
Claim · model-written summary
Under strong drought, tolerant wheat genotypes accumulate 35-70% of their protein content relative to normal water supply.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- strong drought conditionse2
- Outcome
- proteinse2
- Direction
- accumulatee2
- Value
- 35-70%e2
- Comparator
- normal water supplye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Organs of Wheat Genotypes”
e2“Depending on a value of ear photosynthesis and tolerance of plants under strong drought conditions, the genotypes accumulate 35-70% of proteins from their contents in plants under the normal water supply”
Claim · model-written summary
The authors interpret C4-cycle enzymes in C3 plants as playing a role in adaptation to stress.
Verbatim
t0“Organs of Wheat Genotypes”
e3“C4-cycle enzymes (PEP-carboxylase, NAD- and NADP-malate dehydrogenase) in C3-plants play a certain role in their adaptation to stress”
Claim · model-written summary
High-yielding wheat genotypes tolerant to water stress have high activity of C4-cycle enzymes in leaves and ear elements.
- Taxon
- wheatTriticum aestivume4
- Material
- High-yielding wheat genotypese4
- Organ / stage
- leaves and elements of eare4
- Gene
- C4-cycle enzymese4
- Outcome
- activity of C4-cycle enzymese4
- Qualifier
- high activitye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Organs of Wheat Genotypes”
e4“High-yielding wheat genotypes tolerant to water stress have high activity of C4-cycle enzymes in the leaves and elements of ear; under the water stress the C4-cycle enzymes are activated”
Claim · model-written summary
Under water stress, C4-cycle enzymes are activated in wheat.
- Taxon
- wheatTriticum aestivume4
- Treatment
- water stresse4
- Outcome
- C4-cycle enzymese4
- Direction
- activatede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Organs of Wheat Genotypes”
e4“High-yielding wheat genotypes tolerant to water stress have high activity of C4-cycle enzymes in the leaves and elements of ear; under the water stress the C4-cycle enzymes are activated”
Claim · model-written summary
High-productive wheat genotypes differ in the intensity of CO2 assimilation.
- Taxon
- wheatTriticum aestivumt0
- Material
- High- productive genotypese5
- Outcome
- intensity of CO2 assimilatione5
- Qualifier
- high intensitye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Organs of Wheat Genotypes”
e5“High- productive genotypes differ by the high intensity of CO2 assimilation and by the rate of photorespiration”
Claim · model-written summary
High-productive wheat genotypes differ in the rate of photorespiration.
- Taxon
- wheatTriticum aestivumt0
- Material
- High- productive genotypese5
- Outcome
- rate of photorespiratione5
- Qualifier
- differ bye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Organs of Wheat Genotypes”
e5“High- productive genotypes differ by the high intensity of CO2 assimilation and by the rate of photorespiration”
Claim · model-written summary
The ratio of true photosynthesis to photorespiration is close to 3:1 in leaves and ear elements of wheat genotypes.
- Taxon
- wheatTriticum aestivumt0
- Material
- genotypes with various rate of CO2 assimilatione6
- Organ / stage
- in the leaves and in ear elementse6
- Outcome
- ratio of true photosynthesis to photorespiratione6
- Value
- 3:1e6
- Qualifier
- close and equal at an averagee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Organs of Wheat Genotypes”
e6“The value of ratio of true photosynthesis to photorespiration in the leaves and in ear elements in genotypes with various rate of CO2 assimilation are close and equal at an average to 3:1 with increase of the given ratio in intensive genotypes”
Claim · model-written summary
The ratio of photosynthesis to photorespiration increases in intensive wheat genotypes.
- Taxon
- wheatTriticum aestivumt0
- Material
- intensive genotypese6
- Outcome
- given ratioe6
- Direction
- increasee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Organs of Wheat Genotypes”
e6“The value of ratio of true photosynthesis to photorespiration in the leaves and in ear elements in genotypes with various rate of CO2 assimilation are close and equal at an average to 3:1 with increase of the given ratio in intensive genotypes”
Claim · model-written summary
Intensity of true photosynthesis and photorespiration increase in parallel during leaf ontogeny in wheat.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- ontogenesis of leavese7
- Outcome
- intensity of true photosynthesis and photorespiratione7
- Direction
- parallel increasee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Organs of Wheat Genotypes”
e7“Thus, it is possible to denote the parallel increase of the intensity of true photosynthesis and photorespiration in ontogenesis of leaves”
Claim · model-written summary
The authors consider an attempt to reduce photorespiration to raise productivity inconsistent.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- attempt to reduce photorespiratione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Organs of Wheat Genotypes”
e1“the attempt to reduce photorespiration with the purpose of increase of the productivity is inconsistent”
Claim · model-written summary
With increasing drought or tolerance, photorespiration rate decreased to a large degree in ear elements of wheat.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- elements of eare1
- Treatment
- increasing of droughte1
- Outcome
- rate of photorespiratione1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Organs of Wheat Genotypes”
e1“By increasing of a tolerance of genotypes to water stress or with increasing of drought the rate of photorespiration decreased in a large degree in the elements of ear”
Claim · model-written summary
A series of wheat genotypes with high primary and photosynthetic CO2 metabolism activities under water stress was identified.
- Taxon
- wheatTriticum aestivumt0
- Material
- series of genotypese1
- Treatment
- under water stresse1
- Outcome
- high activities of the primary processes and photosynthetic CO2 metabolisme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Organs of Wheat Genotypes”
e1“As a matter of investigation the series of genotypes with high activities of the primary processes and photosynthetic CO2 metabolism under water stress, having the appropriate morphophysiological characters were revealed”
Claim · model-written summary
The authors propose these genotypes as the basis for creating high tolerant wheat varieties.
- Taxon
- wheatTriticum aestivumt0
- Material
- these genotypese1
- Outcome
- creation of high tolerant varietiese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Organs of Wheat Genotypes”
e1“Using of these genotypes with main photosynthetic parameters connected with an intensity of ear activity and with activities of other non-leaf organs and high productivity of a grain protein is the base of creation of high tolerant varieties”
The same questions in other papers
drought · physiology: enzyme activity · Triticum aestivum (wheat)Positive and negative results
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- negative
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See all 21 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.