Abstract
Effects of drought stress on growth, photosynthesis and ultrastructure of mesophyll cells of Ulmus szechuanica Fang seedlings were studied. Results showed that under drought stress both leaf water content (LWC) and relative water content (RWC) decreased significantly and height growth (GH) and base diameter growth (GD) declined. Pn, Tr, Gs, Ci and Ls were significantly affected by water deficit. With the continuing of drought, Pn decreased significantly, the change of Gs, Ci, Tr was same. There existed significant effects of drought on stomatal density (SD), stomatal length (SL), stomatal width (SW), individual stomatal area (As) and percentage of individual stomatal area (At) too. Under drought condition, change of structure and chloroplast morphology of the leaves was evident, the number of chloroplasts and orophil granules increased, their proportion in cells amplified. The number of starch granules became smaller, the arrangement of thylakoids among chloroplasts swollen and tend to be disordered. Bangladesh J. Bot. 51(3): 461-468, 2022 (September)
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Claims 9
Claim · model-written summary
Drought significantly decreased leaf and relative water content.
- Treatment
- drought stresse0
- Outcome
- leaf water content (LWC) and relative water content (RWC)e0
- Direction
- decreasede0
Not reportedTaxonComparator
Verbatim
e0“under drought stress both leaf water content (LWC) and relative water content (RWC) decreased significantly”
Claim · model-written summary
Drought reduced height and basal-diameter growth.
Not reportedTaxonTreatmentComparator
Verbatim
e0“height growth (GH) and base diameter growth (GD) declined.”
Claim · model-written summary
Water deficit significantly affected Pn, Tr, Gs, Ci and Ls.
Not reportedTaxonComparatorDirection
Verbatim
e0“Pn, Tr, Gs, Ci and Ls were significantly affected by water deficit.”
Claim · model-written summary
Pn, Gs, Ci and Tr fell as drought continued.
Not reportedTaxonComparator
Verbatim
e0“With the continuing of drought, Pn decreased significantly, the change of Gs, Ci, Tr was same.”
Claim · model-written summary
Drought significantly affected stomatal density, size, and area measures.
Not reportedTaxonComparatorDirection
Verbatim
e0“There existed significant effects of drought on stomatal density (SD), stomatal length (SL), stomatal width (SW), individual stomatal area (As) and percentage of individual stomatal area (At) too.”
Claim · model-written summary
Drought visibly altered leaf structure and chloroplast morphology.
Not reportedTaxonComparatorDirection
Verbatim
e0“Under drought condition, change of structure and chloroplast morphology of the leaves was evident”
Claim · model-written summary
Chloroplast and orophil granule numbers and cellular proportion increased under drought.
Not reportedTaxonTreatmentComparator
Verbatim
e0“the number of chloroplasts and orophil granules increased, their proportion in cells amplified.”
Claim · model-written summary
Starch granule number decreased under drought.
Not reportedTaxonTreatmentComparator
Verbatim
e0“The number of starch granules became smaller”
Claim · model-written summary
Thylakoid arrangements swelled and became disordered under drought.
- Outcome
- arrangement of thylakoids among chloroplasts swollen and tend to be disorderede0
Not reportedTaxonDirection
Verbatim
e0“the arrangement of thylakoids among chloroplasts swollen and tend to be disordered.”