Abstract
The initiating effects of Ca￣(2+)on pollen germination and its regulative role in pollen tube growth were investigated in Pinus yunnanensis and Nicotiana tabacum. High concentration of Ca￣(2-)(10￣(-1)～IO￣(-2)mol/L)in the medium caused severe inhibition of pollen germination and tube growth,but lower concentration of Ca￣(2+)or Ca￣(2+)-deficiency(10￣(-3～0mol/L)had little effect on pollen ger-mination and tube growth. Measurement of Ca content in germinating pollen showed that there was a significant Ca￣(+2) release from pollen during the hydration and early germination phase. How-ever,Ca￣(2+)specific chelating agent EGTA led to the inhibition of pollen germination,and this inhibi-tion could be eliminated by re-adding excess Ca￣(2+)to the medium containing EGTA. Ca￣(2+)channel blockers verapamil and Co￣(2+)also caused the inhibition or failure of pollen germination, In addition,Ca￣(2+)ionophore A23187 impeded pollen germination and tube growth. Unlike veraparmil and Co￣(2+)treatments,pollen tube growth was more sensitive to A23187 than pollen germination. These results suggested that Ca￣(2+)is indispensible for pollen germination and tube growth although exogenous addition of Ca￣(2+)to the medium is not necessary. The uptake of Ca￣(2+)occurred mainly in early germi-nation phase, and Ca￣(2+)could act as an initiator of pollen germination and also as a regulator of pollen tube growth.
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Claims 20
Claim · model-written summary
High calcium concentration severely inhibited pollen germination and tube growth in Pinus yunnanensis.
- Taxon
- Pinus yunnanensis
Pinus yunnanensise1 - Treatment
- High concentration of Ca￣(2-)(10￣(-1)～IO￣(-2)mol/L)e0
- Outcome
- pollen germination and tube growthe0
- Direction
- severe inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High concentration of Ca￣(2-)(10￣(-1)～IO￣(-2)mol/L)in the medium caused severe inhibition of pollen germination and tube growth”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
High calcium concentration severely inhibited pollen germination and tube growth in Nicotiana tabacum.
- Taxon
- Nicotiana tabacum
Nicotiana tabacume1 - Treatment
- High concentration of Ca￣(2-)(10￣(-1)～IO￣(-2)mol/L)e0
- Outcome
- pollen germination and tube growthe0
- Direction
- severe inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High concentration of Ca￣(2-)(10￣(-1)～IO￣(-2)mol/L)in the medium caused severe inhibition of pollen germination and tube growth”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
Lower calcium concentration had little effect on pollen germination and tube growth in Pinus yunnanensis.
- Taxon
- Pinus yunnanensisPinus yunnanensise1
- Treatment
- lower concentration of Ca￣(2+)e0
- Outcome
- pollen ger-mination and tube growthe0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower concentration of Ca￣(2+)or Ca￣(2+)-deficiency(10￣(-3～0mol/L)had little effect on pollen ger-mination and tube growth”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
Lower calcium concentration had little effect on pollen germination and tube growth in Nicotiana tabacum.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Treatment
- lower concentration of Ca￣(2+)e0
- Outcome
- pollen ger-mination and tube growthe0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower concentration of Ca￣(2+)or Ca￣(2+)-deficiency(10￣(-3～0mol/L)had little effect on pollen ger-mination and tube growth”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
Calcium deficiency had little effect on pollen germination and tube growth in Pinus yunnanensis.
- Taxon
- Pinus yunnanensisPinus yunnanensise1
- Treatment
- Ca￣(2+)-deficiency(10￣(-3～0mol/L)e0
- Outcome
- pollen ger-mination and tube growthe0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower concentration of Ca￣(2+)or Ca￣(2+)-deficiency(10￣(-3～0mol/L)had little effect on pollen ger-mination and tube growth”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
Calcium deficiency had little effect on pollen germination and tube growth in Nicotiana tabacum.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Treatment
- Ca￣(2+)-deficiency(10￣(-3～0mol/L)e0
- Outcome
- pollen ger-mination and tube growthe0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower concentration of Ca￣(2+)or Ca￣(2+)-deficiency(10￣(-3～0mol/L)had little effect on pollen ger-mination and tube growth”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
Pinus yunnanensis pollen released calcium significantly during hydration and early germination.
- Taxon
- Pinus yunnanensisPinus yunnanensise1
- Organ / stage
- hydration and early germination phasee0
- Outcome
- Ca￣(+2) release from pollene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a significant Ca￣(+2) release from pollen during the hydration and early germination phase”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
Nicotiana tabacum pollen released calcium significantly during hydration and early germination.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Organ / stage
- hydration and early germination phasee0
- Outcome
- Ca￣(+2) release from pollene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a significant Ca￣(+2) release from pollen during the hydration and early germination phase”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
EGTA inhibited pollen germination in Pinus yunnanensis; excess calcium eliminated this inhibition.
- Taxon
- Pinus yunnanensisPinus yunnanensise1
- Treatment
- Ca￣(2+)specific chelating agent EGTAe0
- Outcome
- pollen germinatione0
- Direction
- inhibitione0
- Qualifier
- this inhibi-tion could be eliminated by re-adding excess Ca￣(2+)to the medium containing EGTAe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca￣(2+)specific chelating agent EGTA led to the inhibition of pollen germination,and this inhibi-tion could be eliminated by re-adding excess Ca￣(2+)to the medium containing EGTA”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
EGTA inhibited pollen germination in Nicotiana tabacum; excess calcium eliminated this inhibition.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Treatment
- Ca￣(2+)specific chelating agent EGTAe0
- Outcome
- pollen germinatione0
- Direction
- inhibitione0
- Qualifier
- this inhibi-tion could be eliminated by re-adding excess Ca￣(2+)to the medium containing EGTAe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca￣(2+)specific chelating agent EGTA led to the inhibition of pollen germination,and this inhibi-tion could be eliminated by re-adding excess Ca￣(2+)to the medium containing EGTA”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
Verapamil inhibited or prevented pollen germination in Pinus yunnanensis.
- Taxon
- Pinus yunnanensisPinus yunnanensise1
- Treatment
- verapamile0
- Outcome
- pollen germinatione0
- Direction
- inhibition or failuree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca￣(2+)channel blockers verapamil and Co￣(2+)also caused the inhibition or failure of pollen germination”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
Verapamil inhibited or prevented pollen germination in Nicotiana tabacum.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Treatment
- verapamile0
- Outcome
- pollen germinatione0
- Direction
- inhibition or failuree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca￣(2+)channel blockers verapamil and Co￣(2+)also caused the inhibition or failure of pollen germination”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
Cobalt inhibited or prevented pollen germination in Pinus yunnanensis.
- Taxon
- Pinus yunnanensisPinus yunnanensise1
- Treatment
- Co￣(2+)e0
- Outcome
- pollen germinatione0
- Direction
- inhibition or failuree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca￣(2+)channel blockers verapamil and Co￣(2+)also caused the inhibition or failure of pollen germination”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
Cobalt inhibited or prevented pollen germination in Nicotiana tabacum.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Treatment
- Co￣(2+)e0
- Outcome
- pollen germinatione0
- Direction
- inhibition or failuree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca￣(2+)channel blockers verapamil and Co￣(2+)also caused the inhibition or failure of pollen germination”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
A23187 impeded pollen germination and tube growth in Pinus yunnanensis, with tube growth more sensitive.
- Taxon
- Pinus yunnanensisPinus yunnanensise1
- Treatment
- Ca￣(2+)ionophore A23187e0
- Outcome
- pollen germination and tube growthe0
- Direction
- impedede0
- Qualifier
- pollen tube growth was more sensitive to A23187 than pollen germinatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca￣(2+)ionophore A23187 impeded pollen germination and tube growth. Unlike veraparmil and Co￣(2+)treatments,pollen tube growth was more sensitive to A23187 than pollen germination”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
A23187 impeded pollen germination and tube growth in Nicotiana tabacum, with tube growth more sensitive.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Treatment
- Ca￣(2+)ionophore A23187e0
- Outcome
- pollen germination and tube growthe0
- Direction
- impedede0
- Qualifier
- pollen tube growth was more sensitive to A23187 than pollen germinatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca￣(2+)ionophore A23187 impeded pollen germination and tube growth. Unlike veraparmil and Co￣(2+)treatments,pollen tube growth was more sensitive to A23187 than pollen germination”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
Calcium was interpreted as indispensable for pollen germination and tube growth in Pinus yunnanensis without requiring exogenous addition.
- Taxon
- Pinus yunnanensisPinus yunnanensise1
- Compound
- Ca￣(2+)e0
- Outcome
- pollen germination and tube growthe0
- Qualifier
- although exogenous addition of Ca￣(2+)to the medium is not necessarye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca￣(2+)is indispensible for pollen germination and tube growth although exogenous addition of Ca￣(2+)to the medium is not necessary”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
Calcium was interpreted as indispensable for pollen germination and tube growth in Nicotiana tabacum without requiring exogenous addition.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Compound
- Ca￣(2+)e0
- Outcome
- pollen germination and tube growthe0
- Qualifier
- although exogenous addition of Ca￣(2+)to the medium is not necessarye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca￣(2+)is indispensible for pollen germination and tube growth although exogenous addition of Ca￣(2+)to the medium is not necessary”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
Calcium uptake occurred mainly during early germination in Pinus yunnanensis, and calcium could initiate germination and regulate tube growth.
- Taxon
- Pinus yunnanensisPinus yunnanensise1
- Compound
- Ca￣(2+)e0
- Outcome
- pollen germinatione0
- Qualifier
- The uptake of Ca￣(2+)occurred mainly in early germi-nation phasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uptake of Ca￣(2+)occurred mainly in early germi-nation phase, and Ca￣(2+)could act as an initiator of pollen germination and also as a regulator of pollen tube growth”
e1“Pinus yunnanensis and Nicotiana tabacum”
Claim · model-written summary
Calcium uptake occurred mainly during early germination in Nicotiana tabacum, and calcium could initiate germination and regulate tube growth.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Compound
- Ca￣(2+)e0
- Outcome
- pollen germinatione0
- Qualifier
- The uptake of Ca￣(2+)occurred mainly in early germi-nation phasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uptake of Ca￣(2+)occurred mainly in early germi-nation phase, and Ca￣(2+)could act as an initiator of pollen germination and also as a regulator of pollen tube growth”
e1“Pinus yunnanensis and Nicotiana tabacum”
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See all 6 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.