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 15
Claim · model-written summary
Low humidity during early yellowing gave the fastest starch degradation.
- Taxon
- tobacco
Nicotiana tabacume0 - Organ / stage
- leafe0
- Treatment
- low humiditye0
- Outcome
- degradation of starche0
- Direction
- most rapide0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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
Low humidity during early yellowing gave the fastest decrease in leaf water content.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- low humiditye0
- Outcome
- decrease of water contente0
- Direction
- most rapide0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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 highest at low humidity and lowest at high humidity.
- Taxon
- TobaccoNicotiana tabacume1
- Treatment
- low humiditye2
- Outcome
- water losse0
- Direction
- higheste0
- Comparator
- high humiditye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the water loss was the highest while the lowest under high humidity”
e1“Tobacco Leaf”
e2“at low humidity”
Claim · model-written summary
Starch degradation lasted longer under low humidity than CK.
- Taxon
- TobaccoNicotiana tabacume1
- 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
e0“The duration for starch degradation under low humidity was longer than that of CK.”
e1“Tobacco Leaf”
Claim · model-written summary
Cured leaf starch residue ranked high humidity above low humidity above CK.
- Taxon
- TobaccoNicotiana tabacume1
- Outcome
- starch residuee0
- Qualifier
- high humidity yellowing treatment＞low humidity yellowing treatment＞ CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“starch residue in cured leaf of different treatment took the order of high humidity yellowing treatment＞low humidity yellowing treatment＞ CK”
e1“Tobacco Leaf”
Claim · model-written summary
Starch degradation slowed near 50% leaf water content.
- Taxon
- TobaccoNicotiana tabacume1
- Organ / stage
- leafe0
- Outcome
- starch degradatione0
- Direction
- slowe0
- Qualifier
- around 50%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the leaf water content was decreased to around 50%, the starch degradation became slow”
e1“Tobacco Leaf”
Claim · model-written summary
Starch content stabilized near 50% leaf water content.
- Taxon
- TobaccoNicotiana tabacume1
- Organ / stage
- leafe0
- Outcome
- content of starche0
- Direction
- stablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the leaf water content was decreased to around 50%, the starch degradation became slow and the content of starch was stable.”
e1“Tobacco Leaf”
Claim · model-written summary
Starch degradation and leaf water loss were asynchronous.
- Taxon
- TobaccoNicotiana tabacume1
- Outcome
- Starch degradation and decrease of leaf water content was not synchronouse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Starch degradation and decrease of leaf water content was not synchronous.”
e1“Tobacco Leaf”
Claim · model-written summary
Rapid humidity decline caused faster starch degradation during yellowing.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- humidity was decreased at a high speede0
- Outcome
- Starch in tobacco leaf during yellowinge0
- Direction
- more rapidlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Starch in tobacco leaf during yellowing degraded more rapidly when humidity was decreased at a high speed”
Claim · model-written summary
Under rapid humidity decline, starch degradation stopped earlier at a late stage.
- Taxon
- TobaccoNicotiana tabacume2
- Treatment
- humidity was decreased at a high speede1
- Outcome
- degradatione0
- Direction
- stopped earliere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but the degradation stopped earlier at late stage.”
e1“humidity was decreased at a high speed”
e2“Tobacco Leaf”
Claim · model-written summary
High environmental humidity gave quicker starch degradation.
- Taxon
- TobaccoNicotiana tabacume1
- Treatment
- high environmental humiditye0
- Outcome
- degradation of starche0
- Direction
- quickere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a quicker and higher degradation of starch under high environmental humidity.”
e1“Tobacco Leaf”
Claim · model-written summary
High environmental humidity gave higher starch degradation.
- Taxon
- TobaccoNicotiana tabacume1
- Treatment
- high environmental humiditye0
- Outcome
- degradation of starche0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a quicker and higher degradation of starch under high environmental humidity.”
e1“Tobacco Leaf”
Claim · model-written summary
Starch content stabilized when humidity fell to 70%.
- Taxon
- TobaccoNicotiana tabacume1
- Outcome
- content of starche0
- Direction
- stablee0
- Setting
- 70 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the humidity decreased to 70 %,the content of starch was stable.”
e1“Tobacco Leaf”
Claim · model-written summary
Amylase activity started to fall below 75% relative humidity.
- Taxon
- TobaccoNicotiana tabacume1
- Gene
- amylasee0
- Outcome
- activity of amylasee0
- Direction
- decreasee0
- Qualifier
- below 75 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of amylase began to decrease when relative humidity was below 75 %”
e1“Tobacco Leaf”
Claim · model-written summary
Amylase activity remained high below 70% environmental humidity.
- Taxon
- TobaccoNicotiana tabacume2
- Gene
- amylasee1
- Outcome
- activity of amylasee1
- Direction
- highe0
- Qualifier
- below 70 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it kept a high level of activity when the environmental humidity was below 70 %”
e1“activity of amylase”
e2“Tobacco Leaf”