Abstract
To clarify how the components of the entire photosynthetic electron transport chain in response to drought stress in maize. The activities of photosystem II (PSII), photosystem I (PSI), and the electron transport chain between PSII and PSI of maize were investigated by prompt fluorescence (PF), delayed fluorescence (DF) and 820 nm modulated reflection (MR). Maize ( Zea mays L.) plants were subjected to different levels of soil water availability including control, moderate and severe drought stress. A significant decrease in ϕ E 0 , Ψ 0 and PI ABS was found in maize treated with moderate drought stress. A significant increase in ABS/RC was observed, but there were no significant change in the fast MR phase and the amplitude of DF under moderate drought stress compared to the control. Under severe drought stress, the exchange capacity between Q A to Q B , reoxidation capacity of plastoquinol, and the oxidation and re-reduction rates of PC and P 700 all decreased. These results demonstrated that moderate drought stress reduced the photochemical activity of PSII from Q A to PQH 2 , while the photochemical activity of PSI was unscathed. However, severe drought stress inhibited the entire electron transport chain from the donor side of PSII to PSI-end electron acceptors. In addition, the photochemical activity of PSII is more sensitive to drought stress than PSI.
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Claims 8
Claim · model-written summary
Moderate drought stress significantly decreased ϕE0, Ψ0 and PIABS in maize.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant decrease in ϕ E 0 , Ψ 0 and PI ABS was found in maize treated with moderate drought stress”
Claim · model-written summary
Moderate drought stress significantly increased ABS/RC in maize compared with the control.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant increase in ABS/RC was observed, but there were no significant change in the fast MR phase and the amplitude of DF under moderate drought stress compared to the control”
e1“maize treated with moderate drought stress”
Claim · model-written summary
Moderate drought stress caused no significant change in the fast MR phase and the amplitude of DF in maize compared with the control.
- Treatment
- moderate drought stresse0
- Outcome
- the fast MR phase and the amplitude of DFe0
- Direction
- no significant changee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant increase in ABS/RC was observed, but there were no significant change in the fast MR phase and the amplitude of DF under moderate drought stress compared to the control”
e1“maize treated with moderate drought stress”
Claim · model-written summary
Under severe drought stress, the exchange capacity between QA and QB, the reoxidation capacity of plastoquinol, and the oxidation and re-reduction rates of PC and P700 all decreased in maize.
- Treatment
- severe drought stresse0
- Outcome
- the exchange capacity between Q A to Q B , reoxidation capacity of plastoquinol, and the oxidation and re-reduction rates of PC and P 700e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under severe drought stress, the exchange capacity between Q A to Q B , reoxidation capacity of plastoquinol, and the oxidation and re-reduction rates of PC and P 700 all decreased”
e1“maize treated with moderate drought stress”
Claim · model-written summary
Moderate drought stress reduced the photochemical activity of PSII from QA to PQH2 in maize.
- Treatment
- moderate drought stresse0
- Outcome
- photochemical activity of PSII from Q A to PQH 2e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“moderate drought stress reduced the photochemical activity of PSII from Q A to PQH 2, while the photochemical activity of PSI was unscathed”
e1“maize treated with moderate drought stress”
Claim · model-written summary
Under moderate drought stress the photochemical activity of PSI in maize was unscathed.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“moderate drought stress reduced the photochemical activity of PSII from Q A to PQH 2, while the photochemical activity of PSI was unscathed”
e1“maize treated with moderate drought stress”
Claim · model-written summary
Severe drought stress inhibited the entire electron transport chain from the donor side of PSII to the PSI-end electron acceptors in maize.
- Treatment
- severe drought stresse0
- Outcome
- the entire electron transport chain from the donor side of PSII to PSI-end electron acceptorse0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“severe drought stress inhibited the entire electron transport chain from the donor side of PSII to PSI-end electron acceptors”
e1“maize treated with moderate drought stress”
Claim · model-written summary
In maize the photochemical activity of PSII is more sensitive to drought stress than that of PSI.
- Treatment
- drought stresse0
- Outcome
- photochemical activity of PSIIe0
- Direction
- more sensitivee0
- Comparator
- PSIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the photochemical activity of PSII is more sensitive to drought stress than PSI”
e1“maize treated with moderate drought stress”
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See all 121 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.