Abstract
Abstract The effect of crop disease on photosynthetic characteristics is important for disease control. Two varieties, Shenzhou 98 and Neiwuyou 8015 with resistance and susceptibility to bacterial leaf blight ( BLB ), respectively, were selected, and the responses of the net photosynthetic rate ( P N ) to active photon flux density ( PPFD ) and intercellular carbon dioxide concentration ( C i ), as well as chlorophyll fluorescence, pigments and stomatal resistance ( SR ), were measured. The results showed that BLB infection greatly decreased the maximum photosynthetic rate ( P max ), light saturation point ( LSP ), carboxylation efficiency ( CE ), maximal fluorescence (F m ) and actual photochemical efficiency of PSII ( Φ PSII ) but increased the light compensation point ( LCP ) and dark respiratory rate ( R D ), which suggested that the performance of rice photosynthesis was decreased by BLB infection. The BLB infection had a lower effect on resistant rice Shenzhou 98 than on susceptible rice Neiwuyou 8015. The reduction of pigment and increased SR caused by BLB infection may have resulted in the decline in the photosynthetic rate. Significant effects of the BLB infection were observed on chlorophyll fluorescence F m and Φ PSII in resistant and susceptible rice. These parameters may be useful for noninvasive monitoring of plant disease considering the negative effect caused by other stresses.
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Claims 9
Claim · model-written summary
BLB infection decreased photosynthetic rate, light saturation, carboxylation and fluorescence measures.
- Taxon
- rice
Oryza sativat0 - Treatment
- BLB infectione0
- Outcome
- maximum photosynthetic rate ( P max ), light saturation point ( LSP ), carboxylation efficiency ( CE )e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BLB infection greatly decreased the maximum photosynthetic rate ( P max ), light saturation point ( LSP ), carboxylation efficiency ( CE ), maximal fluorescence (F m ) and actual photochemical efficiency of PSII ( Φ PSII )”
t0“rice”
Claim · model-written summary
BLB infection decreased maximal fluorescence and PSII photochemical efficiency.
- Taxon
- riceOryza sativat0
- Treatment
- BLB infectione0
- Outcome
- maximal fluorescence (F m ) and actual photochemical efficiency of PSII ( Φ PSII )e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BLB infection greatly decreased the maximum photosynthetic rate ( P max ), light saturation point ( LSP ), carboxylation efficiency ( CE ), maximal fluorescence (F m ) and actual photochemical efficiency of PSII ( Φ PSII )”
t0“rice”
Claim · model-written summary
BLB infection increased light compensation point and dark respiration.
- Taxon
- riceOryza sativat0
- Treatment
- bacterial leaf blightt0
- Outcome
- light compensation point ( LCP ) and dark respiratory rate ( R D )e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but increased the light compensation point ( LCP ) and dark respiratory rate ( R D )”
t0“Influence of bacterial leaf blight on the photosynthetic characteristics of resistant and susceptible rice”
Claim · model-written summary
BLB had a smaller effect on resistant Shenzhou 98 than susceptible Neiwuyou 8015.
- Taxon
- riceOryza sativae0
- Material
- Shenzhou 98e0
- Outcome
- effecte0
- Direction
- lowere0
- Comparator
- Neiwuyou 8015e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The BLB infection had a lower effect on resistant rice Shenzhou 98 than on susceptible rice Neiwuyou 8015.”
Claim · model-written summary
BLB reduced pigment and increased stomatal resistance.
- Taxon
- riceOryza sativat0
- Treatment
- BLB infectione0
- Outcome
- pigmente0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduction of pigment and increased SR caused by BLB infection may have resulted in the decline in the photosynthetic rate.”
t0“rice”
Claim · model-written summary
BLB increased stomatal resistance.
- Taxon
- riceOryza sativat0
- Treatment
- BLB infectione0
- Outcome
- SRe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduction of pigment and increased SR caused by BLB infection may have resulted in the decline in the photosynthetic rate.”
t0“rice”
Claim · model-written summary
Pigment reduction and greater stomatal resistance may explain lower photosynthetic rate.
- Taxon
- riceOryza sativat0
- Treatment
- BLB infectione0
- Outcome
- decline in the photosynthetic ratee0
- Qualifier
- may have resultede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduction of pigment and increased SR caused by BLB infection may have resulted in the decline in the photosynthetic rate.”
t0“rice”
Claim · model-written summary
BLB significantly affected maximal fluorescence and PSII efficiency in both rice types.
- Taxon
- riceOryza sativae0
- Treatment
- BLB infectione0
- Outcome
- chlorophyll fluorescence F m and Φ PSIIe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant effects of the BLB infection were observed on chlorophyll fluorescence F m and Φ PSII in resistant and susceptible rice.”
Claim · model-written summary
The authors suggest fluorescence measures for noninvasive disease monitoring.
- Taxon
- riceOryza sativat0
- Outcome
- noninvasive monitoring of plant diseasee0
- Qualifier
- may be usefule0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These parameters may be useful for noninvasive monitoring of plant disease considering the negative effect caused by other stresses.”
t0“rice”
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