Abstract
Pot cultivation experiments in greenhouse were conducted to study the effects of enhanced UV-B radiation on the diurnal variations of flavonoids in wheat leaves during grain filling stage. The results showed that the flavonoids content of wheat leaves increased significantly under the enhanced UV-B radiation at daytime, and then declined at night when they were released from the stress of UV-B radiation. Meanwhile, the difference of flavonoids content between control and UV-B treatment decreased gradually. The activity of phenylalanine ammonialyase also showed a similar trend with that of content of flavornoids. Simultaneously, the net photosynthetic rate of wheat was not affected by supplementary UV-B radiation, but the respiration rate was enhanced significantly at night. The results implied that the continuous fluctuation of flavonoids content might be another explanation why biomass was reduced significantly while plant net photosynthesis was not influenced by enhanced UV-B radiation.
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Claims 8
Claim · model-written summary
Enhanced UV-B significantly increased wheat leaf flavonoid content in daytime.
- Taxon
- wheat
Triticum aestivume0 - Organ / stage
- leavese0
- Treatment
- enhanced UV-B radiatione0
- Outcome
- flavonoids contente0
- Direction
- increasede0
- Qualifier
- at daytimee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the flavonoids content of wheat leaves increased significantly under the enhanced UV-B radiation at daytime”
Claim · model-written summary
Wheat leaf flavonoid content declined at night after UV-B stress ended.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- leavest0
- Outcome
- declined at nighte0
- Direction
- declinede0
- Qualifier
- when they were released from the stress of UV-B radiatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“then declined at night when they were released from the stress of UV-B radiation”
t0“wheat leaves”
Claim · model-written summary
The flavonoid-content difference between control and UV-B treatment gradually decreased.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- UV-B treatmente0
- Outcome
- difference of flavonoids contente0
- Direction
- decreased graduallye0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the difference of flavonoids content between control and UV-B treatment decreased gradually”
t0“wheat leaves”
Claim · model-written summary
Phenylalanine ammonialyase activity showed a similar diurnal trend to flavonoid content.
- Taxon
- wheatTriticum aestivumt0
- Gene
- phenylalanine ammonialyasee0
- Outcome
- activity of phenylalanine ammonialyasee0
- Qualifier
- similar trend with that of content of flavornoidse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of phenylalanine ammonialyase also showed a similar trend with that of content of flavornoids”
t0“wheat leaves”
Claim · model-written summary
Supplementary UV-B did not affect wheat net photosynthetic rate.
- Taxon
- wheatTriticum aestivume0
- Treatment
- supplementary UV-B radiatione0
- Outcome
- net photosynthetic ratee0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the net photosynthetic rate of wheat was not affected by supplementary UV-B radiation”
Claim · model-written summary
Supplementary UV-B significantly enhanced wheat respiration rate at night.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- supplementary UV-B radiatione1
- Outcome
- respiration ratee0
- Direction
- enhancede0
- Qualifier
- at nighte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the respiration rate was enhanced significantly at night”
t0“wheat leaves”
e1“supplementary UV-B radiation”
Claim · model-written summary
Enhanced UV-B significantly reduced wheat biomass.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- enhanced UV-B radiatione0
- Outcome
- biomasse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biomass was reduced significantly while plant net photosynthesis was not influenced by enhanced UV-B radiation”
t0“wheat leaves”
Claim · model-written summary
The authors suggest fluctuating flavonoid content may explain reduced biomass despite unchanged net photosynthesis.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- biomass was reduced significantlye0
- Qualifier
- continuous fluctuation of flavonoids contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the continuous fluctuation of flavonoids content might be another explanation why biomass was reduced significantly while plant net photosynthesis was not influenced by enhanced UV-B radiation”
t0“wheat leaves”
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See all 9 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.