Abstract
Seed priming is an effective technology of promoting seed germination and plant growth in crop production. This study investigated IAA as a seed priming agent in cotton, because auxins regulate plant growth and development, as early as seed germination and seedling growth. Exogenous IAA (20 mg L−1) was applied to initiate the cotton seeds, and the phenotypic and relative biological changes of germinating and germinated seedling were examined. After IAA priming, the seed germination ability was significantly promoted based on germination rate, index and speed. In seedlings at the end of germination test, the content of endogenous phytohormones were in pattern to favor the growth of germinating seedlings, and sugars contents including sucrose, glucose and fructose were also increased, as a result of the enhanced activities of enzymes related to sucrose metabolism. It was indicated that IAA priming could accelerate the seed germination by regulating the endogenous hormones and sucrose metabolism. Moreover, during seedling stage, seedlings from seeds with IAA priming showed more vigor growth with improved root length, seedling height, biomass and leaf photosynthesis capacity. That was also accompanied with increased sugars contents and the activities of key enzymes in sucrose metabolism as well as a better counteractive balance of key endogenous phytohormones in the seedlings. Therefore, IAA priming resulted in enhanced seed germination and seedling growth, along with favorable shifts in endogenous phytohormones and sucrose metabolism, suggesting that it has favorable regulatory effects on these growth parameters. The simple application of IAA to improve cotton seedling establishment in this study showed its potential for application of this technology on increasing cotton crop production.
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Claims 10
Claim · model-written summary
IAA priming significantly improved cotton germination rate, index and speed.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- IAA priminge0
- Outcome
- germination rate, index and speede0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After IAA priming, the seed germination ability was significantly promoted based on germination rate, index and speed.”
t0“cotton”
Claim · model-written summary
IAA priming shifted endogenous phytohormone content toward seedling growth.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- seedlings at the end of germination teste0
- Treatment
- IAA priminge1
- Outcome
- content of endogenous phytohormonese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“In seedlings at the end of germination test, the content of endogenous phytohormones were in pattern to favor the growth of germinating seedlings”
e1“After IAA priming, the seed germination ability”
Claim · model-written summary
IAA priming increased sucrose, glucose and fructose content at the end of germination.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- IAA priminge1
- Outcome
- sugars contents including sucrose, glucose and fructosee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“sugars contents including sucrose, glucose and fructose were also increased”
e1“After IAA priming, the seed germination ability”
Claim · model-written summary
IAA priming enhanced activity of enzymes related to sucrose metabolism during germination.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- IAA priminge1
- Outcome
- activities of enzymes related to sucrose metabolisme0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“enhanced activities of enzymes related to sucrose metabolism”
e1“After IAA priming, the seed germination ability”
Claim · model-written summary
IAA priming improved seedling root length, height and biomass.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- IAA priminge0
- Outcome
- root length, seedling height, biomasse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“seedlings from seeds with IAA priming showed more vigor growth with improved root length, seedling height, biomass and leaf photosynthesis capacity”
Claim · model-written summary
IAA priming improved seedling leaf photosynthesis capacity.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- IAA priminge0
- Outcome
- leaf photosynthesis capacitye0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“seedlings from seeds with IAA priming showed more vigor growth with improved root length, seedling height, biomass and leaf photosynthesis capacity”
Claim · model-written summary
IAA priming increased seedling sugar content.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- IAA priminge1
- Outcome
- sugars contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“That was also accompanied with increased sugars contents and the activities of key enzymes in sucrose metabolism”
e1“seedlings from seeds with IAA priming”
Claim · model-written summary
IAA priming increased activity of key enzymes in seedling sucrose metabolism.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- IAA priminge1
- Outcome
- activities of key enzymes in sucrose metabolisme0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“That was also accompanied with increased sugars contents and the activities of key enzymes in sucrose metabolism”
e1“seedlings from seeds with IAA priming”
Claim · model-written summary
IAA priming improved the balance of key endogenous phytohormones in seedlings.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- IAA priminge1
- Outcome
- counteractive balance of key endogenous phytohormonese0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“a better counteractive balance of key endogenous phytohormones in the seedlings”
e1“seedlings from seeds with IAA priming”
Claim · model-written summary
The authors suggest IAA priming could improve cotton seedling establishment for crop production.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- IAAe0
- Outcome
- application of this technology on increasing cotton crop productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The simple application of IAA to improve cotton seedling establishment in this study showed its potential for application of this technology on increasing cotton crop production.”
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See all 6 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.