Abstract
Mepiquat chloride (MC) is an indispensable plant growth regulator in cotton cultivation, which can promote the assimilates to transfer to bolls. Nevertheless, the mechanism is still unclear. In this study, the weight of cotton bolls was found to increase significantly from 6 to 15 d after MC treatment, with a higher proportion of the increased dry matter being distributed to fibers compared to other parts of the boll. The ABA content, sucrose synthase and acid invertase activities in fibers increased significantly after MC treatment. The transcriptome, exogenous ABA spraying and VIGS experiments confirmed that the increase of ABA content in fibers was due to the up-regulation of biosynthetic genes GhNCED1A , GhNCED1B , and GhVP14 after MC treatment. The increased ABA induced the expression of genes encoding acid invertase and sucrose synthase, which ultimately accelerated the decomposition and transport of sucrose in the fibers, resulting in more glucose and fructose to enhance the cellulose synthesis and increase the boll weight. • MC treatment upregulated the expression of NCED genes resulting in ABA increase. • ABA positively induced the activity of sucrose synthase and acid invertase. • Accelerated decomposition and transport of sucrose enhanced the cellulose synthesis.
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Claims 9
Claim · model-written summary
Mepiquat chloride significantly increased cotton boll weight from 6 to 15 days after treatment.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- MC treatmente0
- Outcome
- weight of cotton bollse0
- Direction
- increasee0
- Qualifier
- from 6 to 15 de0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the weight of cotton bolls was found to increase significantly from 6 to 15 d after MC treatment”
Claim · model-written summary
More of the increased dry matter was allocated to cotton fibers than to other boll parts.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- fiberse0
- Outcome
- dry matter being distributed to fiberse0
- Direction
- highere0
- Comparator
- other parts of the bolle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with a higher proportion of the increased dry matter being distributed to fibers compared to other parts of the boll”
t0“cotton bolls”
Claim · model-written summary
Mepiquat chloride significantly increased ABA content in cotton fibers.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- fiberse0
- Treatment
- MC treatmente0
- Outcome
- ABA contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ABA content, sucrose synthase and acid invertase activities in fibers increased significantly after MC treatment”
t0“cotton bolls”
Claim · model-written summary
Mepiquat chloride significantly increased sucrose synthase activity in cotton fibers.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- fiberse0
- Treatment
- MC treatmente0
- Gene
- sucrose synthasee0
- Outcome
- sucrose synthasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ABA content, sucrose synthase and acid invertase activities in fibers increased significantly after MC treatment”
t0“cotton bolls”
Claim · model-written summary
Mepiquat chloride significantly increased acid invertase activity in cotton fibers.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- fiberse0
- Treatment
- MC treatmente0
- Gene
- acid invertasee0
- Outcome
- acid invertase activitiese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ABA content, sucrose synthase and acid invertase activities in fibers increased significantly after MC treatment”
t0“cotton bolls”
Claim · model-written summary
Mepiquat chloride upregulated GhNCED1A, GhNCED1B and GhVP14, increasing ABA in cotton fibers.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- MC treatmente0
- Gene
- GhNCED1A , GhNCED1B , and GhVP14e0
- Outcome
- increase of ABA content in fiberse0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase of ABA content in fibers was due to the up-regulation of biosynthetic genes GhNCED1A , GhNCED1B , and GhVP14 after MC treatment”
t0“cotton bolls”
Claim · model-written summary
Increased ABA induced acid invertase and sucrose synthase gene expression in cotton fibers.
- Taxon
- cottonGossypium hirsutumt0
- Gene
- acid invertase and sucrose synthasee0
- Compound
- ABAe0
- Outcome
- expression of genes encoding acid invertase and sucrose synthasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increased ABA induced the expression of genes encoding acid invertase and sucrose synthase”
t0“cotton bolls”
Claim · model-written summary
ABA-induced enzyme expression accelerated sucrose decomposition and transport in cotton fibers.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- decomposition and transport of sucrose in the fiberse0
- Qualifier
- acceleratede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which ultimately accelerated the decomposition and transport of sucrose in the fibers”
t0“cotton bolls”
Claim · model-written summary
Increased glucose and fructose enhanced cellulose synthesis and boll weight in cotton.
- Taxon
- cottonGossypium hirsutumt0
- Compound
- glucose and fructosee0
- Outcome
- cellulose synthesis and increase the boll weighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resulting in more glucose and fructose to enhance the cellulose synthesis and increase the boll weight”
t0“cotton bolls”
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