Abstract
Effect of environmental humidity and water content in tobacco leaf on starch metabolism was studied by using the electric-heated auto-controlled flue-curing barn supplied by Henan Agricultural University, China. The results indicated that the degradation of starch and decrease of water content in tobacco leaf during early yellowing at low humidity was the most rapid, and the water loss was the highest while the lowest under high humidity. The duration for starch degradation under low humidity was longer than that of CK. So the starch residue in cured leaf of different treatment took the order of high humidity yellowing treatment low humidity yellowing treatment CK. When the leaf water content was decreased to around 50 %, the starch degradation became slow and the content of starch was stable. Starch degradation and decrease of leaf water content was not synchronous. Starch in tobacco leaf during yellowing degraded more rapidly when humidity was decreased at a high speed, but the degradation stopped earlier at late stage. There was a quicker and higher degradation of starch under high environmental humidity. When the humidity decreased to 70 %, the content of starch was stable. The activity of amylase began to decrease when relative humidity was below 75 %, but it kept a high level of activity when the environmental humidity was below 70 %.
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Claims 11
Claim · model-written summary
During early yellowing at low humidity, starch degradation and the decrease of water content in tobacco leaf were the most rapid.
- Taxon
- Tobacco
Nicotiana tabacumt0 - Organ / stage
- early yellowinge0
- Treatment
- low humiditye0
- Outcome
- degradation of starch and decrease of water contente0
- Direction
- most rapide0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Leaf”
e0“the degradation of starch and decrease of water content in tobacco leaf during early yellowing at low humidity was the most rapid”
Claim · model-written summary
Water loss was lowest under high humidity.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- high humiditye0
- Outcome
- water losse0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Leaf”
e0“the water loss was the highest while the lowest under high humidity”
Claim · model-written summary
Starch residue in cured leaf differed among high-humidity yellowing, low-humidity yellowing and CK treatments in the stated order.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- high humidity yellowing treatmente0
- Outcome
- starch residue in cured leafe0
- Qualifier
- took the order of high humidity yellowing treatment low humidity yellowing treatment CKe0
- Comparator
- CKe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Leaf”
e0“the starch residue in cured leaf of different treatment took the order of high humidity yellowing treatment low humidity yellowing treatment CK”
Claim · model-written summary
The duration of starch degradation under low humidity was longer than in CK.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- low humiditye0
- Outcome
- duration for starch degradatione0
- Direction
- longere0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Leaf”
e0“The duration for starch degradation under low humidity was longer than that of CK”
Claim · model-written summary
When leaf water content fell to around 50%, starch degradation became slow and starch content was stable.
- Taxon
- TobaccoNicotiana tabacumt0
- Outcome
- starch degradation became slowe0
- Qualifier
- leaf water content was decreased to around 50 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Leaf”
e0“When the leaf water content was decreased to around 50 %, the starch degradation became slow and the content of starch was stable”
Claim · model-written summary
Starch degradation and the decrease of leaf water content were not synchronous.
- Taxon
- TobaccoNicotiana tabacumt0
- Outcome
- not synchronouse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Leaf”
e0“Starch degradation and decrease of leaf water content was not synchronous”
Claim · model-written summary
Starch in tobacco leaf degraded more rapidly during yellowing when humidity was decreased at a high speed, but degradation stopped earlier at the late stage.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- humidity was decreased at a high speede0
- Outcome
- Starch in tobacco leafe0
- Direction
- degraded more rapidlye0
- Qualifier
- degradation stopped earlier at late stagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Leaf”
e0“Starch in tobacco leaf during yellowing degraded more rapidly when humidity was decreased at a high speed, but the degradation stopped earlier at late stage”
Claim · model-written summary
Starch degradation was quicker and higher under high environmental humidity.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- high environmental humiditye0
- Outcome
- degradation of starche0
- Direction
- quicker and highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Leaf”
e0“There was a quicker and higher degradation of starch under high environmental humidity”
Claim · model-written summary
When humidity decreased to 70%, starch content was stable.
- Taxon
- TobaccoNicotiana tabacumt0
- Outcome
- content of starch was stablee0
- Qualifier
- humidity decreased to 70 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Leaf”
e0“When the humidity decreased to 70 %, the content of starch was stable”
Claim · model-written summary
Amylase activity began to decrease when relative humidity fell below 75%.
- Taxon
- TobaccoNicotiana tabacumt0
- Outcome
- activity of amylasee0
- Direction
- decreasee0
- Qualifier
- relative humidity was below 75 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Leaf”
e0“The activity of amylase began to decrease when relative humidity was below 75 %”
Claim · model-written summary
Amylase activity stayed at a high level when environmental humidity was below 70%.
- Taxon
- TobaccoNicotiana tabacumt0
- Outcome
- high level of activitye0
- Qualifier
- environmental humidity was below 70 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Leaf”
e0“it kept a high level of activity when the environmental humidity was below 70 %”