Abstract
A field experiment was conducted to study the impact of the exclusion of the solar UV components on growth, photosynthesis and nitrogen metabolism in soybean (Glycine max) varieties PK-472, Pusa-24, JS 71-05, JS-335, NRC-7 and Kalitur. The plants were grown in specially designed UV exclusion chambers wrapped with filters to exclude UV-B or UV-A/B and transmitted all UV. Exclusion of UV significantly enhanced the growth of the aerial parts as well as the growth of the below ground parts in all of the six soybean varieties. Nitrate reductase activity (NRA) was significantly reduced, whereas leghemoglobin (Lb) content, total soluble protein, net photosynthesis (Pn) and α-tocopherol content were enhanced after UV exclusion. The exclusion of solar UV-A/B enhanced all parameters to a larger extent than the exclusion of solar UV-B in four of the six varieties of soybean except for NRC-7 and Kalitur. These two varieties responded more to UV-B exclusion compared to UV-A/B exclusion. A significant inverse correlation between the NRA and the number of nodules per plant was observed. The extent of response in all parameters was greater in PK-472 and JS71-05 than that in Kalitur and JS-335 after UV exclusion. The exclusion of UV augmented the growth of nodules, Lb content and α-tocopherol levels and conferred higher rates of Pn to support better growth of nodules. Control plants (+ UV-A/B) seemed to fulfill their N demand through the assimilation of NO3− resulting in lower symbiotic nitrogen fixation and higher NR activity.
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Claims 10
Claim · model-written summary
UV exclusion significantly enhanced aerial and belowground growth in six soybean varieties.
- Taxon
- soybean
Glycine maxe0 - Treatment
- Exclusion of UVe0
- Outcome
- growth of the aerial parts as well as the growth of the below ground partse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exclusion of UV significantly enhanced the growth of the aerial parts as well as the growth of the below ground parts in all of the six soybean varieties”
Claim · model-written summary
UV exclusion significantly reduced nitrate reductase activity.
- Taxon
- soybeanGlycine maxt0
- Treatment
- UV exclusione0
- Outcome
- Nitrate reductase activity (NRA)e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrate reductase activity (NRA) was significantly reduced, whereas leghemoglobin (Lb) content, total soluble protein, net photosynthesis (Pn) and α-tocopherol content were enhanced after UV exclusion”
t0“soybean”
Claim · model-written summary
UV exclusion enhanced leghemoglobin content, total soluble protein, and net photosynthesis.
- Taxon
- soybeanGlycine maxt0
- Treatment
- UV exclusione0
- Outcome
- leghemoglobin (Lb) content, total soluble protein, net photosynthesis (Pn)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leghemoglobin (Lb) content, total soluble protein, net photosynthesis (Pn) and α-tocopherol content were enhanced after UV exclusion”
t0“soybean”
Claim · model-written summary
UV exclusion enhanced α-tocopherol content.
- Taxon
- soybeanGlycine maxt0
- Treatment
- UV exclusione0
- Outcome
- α-tocopherol contente0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“α-tocopherol content were enhanced after UV exclusion”
t0“soybean”
Claim · model-written summary
UV-A/B exclusion enhanced measured parameters more than UV-B exclusion in four varieties.
- Taxon
- soybeanGlycine maxe0
- Treatment
- exclusion of solar UV-A/Be0
- Outcome
- all parameterse0
- Direction
- enhancede0
- Value
- four of the six varietiese0
- Comparator
- exclusion of solar UV-Be0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The exclusion of solar UV-A/B enhanced all parameters to a larger extent than the exclusion of solar UV-B in four of the six varieties of soybean except for NRC-7 and Kalitur”
Claim · model-written summary
NRC-7 and Kalitur responded more to UV-B than UV-A/B exclusion.
- Taxon
- soybeanGlycine maxt0
- Treatment
- UV-B exclusione0
- Outcome
- responded moree0
- Direction
- moree0
- Comparator
- UV-A/B exclusione0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These two varieties responded more to UV-B exclusion compared to UV-A/B exclusion”
t0“soybean”
Claim · model-written summary
Nitrate reductase activity inversely correlated with nodule number.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- nodulese0
- Outcome
- number of nodules per plante0
- Direction
- inversee0
- Qualifier
- NRAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant inverse correlation between the NRA and the number of nodules per plant was observed”
t0“soybean”
Claim · model-written summary
UV exclusion produced larger responses in PK-472 and JS71-05 than in Kalitur and JS-335.
- Taxon
- soybeanGlycine maxt0
- Material
- PK-472 and JS71-05e0
- Treatment
- UV exclusione0
- Outcome
- extent of response in all parameterse0
- Direction
- greatere0
- Comparator
- Kalitur and JS-335e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The extent of response in all parameters was greater in PK-472 and JS71-05 than that in Kalitur and JS-335 after UV exclusion”
t0“soybean”
Claim · model-written summary
UV exclusion increased nodule growth.
- Taxon
- soybeanGlycine maxt0
- Treatment
- exclusion of UVe0
- Outcome
- growth of nodulese0
- Direction
- augmentede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The exclusion of UV augmented the growth of nodules, Lb content and α-tocopherol levels and conferred higher rates of Pn”
t0“soybean”
Claim · model-written summary
Control plants appeared to meet nitrogen demand through nitrate assimilation, with lower symbiotic fixation and higher NR activity.
- Taxon
- soybeanGlycine maxt0
- Outcome
- lower symbiotic nitrogen fixation and higher NR activitye0
- Qualifier
- assimilation of NO3−e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Control plants (+ UV-A/B) seemed to fulfill their N demand through the assimilation of NO3− resulting in lower symbiotic nitrogen fixation and higher NR activity”
t0“soybean”
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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.