Abstract
Earlier we have reported that the exclusion of solar UV-B increased the growth and yield of cotton plants as compared with ambient UV-B. The UV-B radiation effects on the saponins and the impact of ambient and reduced UV-B on the accumulation of saponins has not been investigated yet. Thus a field experiment was conducted to study the influence of solar UV-B on the growth response and saponin synthesis in cotton (Gossypium hirsutum) var. Vikram plants by the exclusion of UV-B. The cotton plants were grown in specially designed iron chambers, wrapped with filters that excluded UV-B (<315 nm), or transmitted ambient UV-B. Exclusion of ambient UV-B enhanced the growth of cotton plants in terms of plant height and leaf area. Greater plant height in UV-B excluded plants was due to elongated internode and more number of nodes. Enhancement in growth was accompanied by a decrease in the accumulation of saponins, which was quantified by the spectrophotometric, TLC and HPLC methods. Solvent extraction of saponins from the internodes and leaves were used for the bioassay of Amaranthus hypocotyl growth and expansion of cucumber cotyledons. Extracts obtained from the UV-B excluded plants (leaves and internodes) promoted the growth to a larger extent as compared with the extracts obtained from ambient grown plants. The result indicates that solar UV-B may possibly suppress the plant growth by regulating the synthesis of natural growth inhibitor’s like saponin.
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Claims 5
Claim · model-written summary
Excluding ambient UV-B enhanced cotton plant height and leaf area.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- Exclusion of ambient UV-Be0
- Outcome
- plant height and leaf areae0
- Direction
- enhancede0
- Comparator
- ambient UV-Be0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exclusion of ambient UV-B enhanced the growth of cotton plants in terms of plant height and leaf area”
Claim · model-written summary
The greater plant height of UV-B-excluded cotton plants is attributed to elongated internodes and more nodes.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- UV-B excluded plantse1
- Outcome
- plant heighte1
- Qualifier
- elongated internode and more number of nodese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exclusion of ambient UV-B enhanced the growth of cotton plants in terms of plant height and leaf area”
e1“Greater plant height in UV-B excluded plants was due to elongated internode and more number of nodes”
Claim · model-written summary
Excluding ambient UV-B decreased the accumulation of saponins in cotton.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Exclusion of ambient UV-Be0
- Outcome
- accumulation of saponinse2
- Direction
- decreasee2
- Comparator
- ambient UV-Be0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exclusion of ambient UV-B enhanced the growth of cotton plants in terms of plant height and leaf area”
e2“Enhancement in growth was accompanied by a decrease in the accumulation of saponins”
Claim · model-written summary
Extracts from UV-B-excluded cotton plants promoted growth in bioassays to a larger extent than extracts from ambient-grown plants.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- extracts obtained from the UV-B excluded plantse3
- Outcome
- growthe3
- Direction
- promotede3
- Comparator
- extracts obtained from ambient grown plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exclusion of ambient UV-B enhanced the growth of cotton plants in terms of plant height and leaf area”
e3“Extracts obtained from the UV-B excluded plants (leaves and internodes) promoted the growth to a larger extent as compared with the extracts obtained from ambient grown plants”
Claim · model-written summary
Solar UV-B may suppress cotton plant growth by regulating the synthesis of the growth inhibitor saponin.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- solar UV-Be4
- Compound
- saponine4
- Outcome
- plant growthe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exclusion of ambient UV-B enhanced the growth of cotton plants in terms of plant height and leaf area”
e4“solar UV-B may possibly suppress the plant growth by regulating the synthesis of natural growth inhibitor’s like saponin”
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See all 43 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.