Abstract
The cold-acclimation effects on the Ca~(2+)-ATPase activities in plasmolemma of the winter wheat seedlings (Triticum aestivum L.) were studied with electromicroscopic-cytochemical assay in which cerium trichloride precipitation method was adopted. The main conclusions are: (1) The plasmolemma Ca~(2+)-ATPase activities of the wheat seedlings treated at -9℃ for 3h decreased considerably as compared with those of the seedlings grown at the optimal temperature of 20℃. A further impediment of the enzyme activities was observed when the cold-stress was prolonged to 12h at -9℃. And complete enzyme inactivation as well as damage of ultrastructure of cells occurred when the seedlings were subjected to cold-stress at -9℃ for 24h. (2) If seedlings were cold-acclimated at 2℃ for 15d, the plasmolemma Ca~(2+)-ATPase activities were higher than those of the non-acclimated seedlings.
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Claims 5
Claim · model-written summary
At -9℃ for 3h, seedling plasmolemma ATPase activity decreased compared with 20℃.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- -9℃ for 3he0
- Gene
- Ca~(2+)-ATPasee0
- Outcome
- plasmolemma Ca~(2+)-ATPase activitiese0
- Direction
- decreased considerablye0
- Comparator
- 20℃e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plasmolemma Ca~(2+)-ATPase activities of the wheat seedlings treated at -9℃ for 3h decreased considerably as compared with those of the seedlings grown at the optimal temperature of 20℃.”
Claim · model-written summary
Extending cold stress to 12h further impeded enzyme activity.
- Taxon
- winter wheat seedlingsTriticum aestivumt0
- Treatment
- 12h at -9℃e0
- Outcome
- enzyme activitiese0
- Direction
- further impedimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A further impediment of the enzyme activities was observed when the cold-stress was prolonged to 12h at -9℃.”
t0“Winter Wheat Seedlings”
Claim · model-written summary
Cold stress at -9℃ for 24h completely inactivated the enzyme.
- Taxon
- Winter Wheat SeedlingsTriticum aestivumt0
- Treatment
- cold-stress at -9℃ for 24he0
- Outcome
- enzyme inactivatione0
- Direction
- completee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“And complete enzyme inactivation as well as damage of ultrastructure of cells occurred when the seedlings were subjected to cold-stress at -9℃ for 24h.”
t0“Winter Wheat Seedlings”
Claim · model-written summary
Cold stress at -9℃ for 24h damaged cellular ultrastructure.
- Taxon
- Winter Wheat SeedlingsTriticum aestivumt0
- Treatment
- cold-stress at -9℃ for 24he0
- Outcome
- damage of ultrastructure of cellse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“And complete enzyme inactivation as well as damage of ultrastructure of cells occurred when the seedlings were subjected to cold-stress at -9℃ for 24h.”
t0“Winter Wheat Seedlings”
Claim · model-written summary
Acclimation at 2℃ for 15d raised ATPase activities relative to non-acclimated seedlings.
- Taxon
- Winter Wheat SeedlingsTriticum aestivumt0
- Treatment
- cold-acclimated at 2℃ for 15de0
- Outcome
- plasmolemma Ca~(2+)-ATPase activitiese0
- Direction
- highere0
- Comparator
- non-acclimated seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“If seedlings were cold-acclimated at 2℃ for 15d, the plasmolemma Ca~(2+)-ATPase activities were higher than those of the non-acclimated seedlings.”
t0“Winter Wheat Seedlings”
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