Abstract
Pollen grains may become desiccated after independence from parent plants and remain viable in an inactive dry state during presentation and dispersal, until the conditions for rehydration and germination are prepared. But some pollen types do not tolerate the desiccation state and lose the germination power soon after release, and therefore, are difficult to store. In this study, moisture content, germinability, cytology and dehydrin and phenolics contents were surveyed in pistachio pollen at fresh and desiccated states. Mature pollen lost 54.1% of its initial moisture after 48 h desiccation along with severe decrease in germinability. Light microscopy results indicated that a low rate of pollen grains have vegetative cell rupture caused by desiccation, but a higher rate of grains were intact in appearance. Numerous amyloplasts persisted after desiccation as a sensitivity indicator. A 16 kDa dehydrin band was detected by western blot method with higher content in desiccated than fresh samples. High performance liquid chromatography (HPLC) analysis showed that the total content of phenolics increased slightly by desiccation. These results indicate the insufficiency of dehydrin and phenolics accumulation for achievement of desiccation tolerance. Furthermore, the severe loss of germinability in desiccated pistachio pollen may be the result of deficiency in some other protective mechanisms that need further investigations.
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Claims 9
Claim · model-written summary
Mature pistachio pollen lost 54.1% of initial moisture after 48 h desiccation.
- Taxon
- pistachio
Pistacia verat0 - Organ / stage
- pollent0
- Treatment
- 48 h desiccatione0
- Outcome
- initial moisturee0
- Direction
- loste0
- Value
- 54.1%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mature pollen lost 54.1% of its initial moisture after 48 h desiccation”
t0“pistachio (Pistacia vera L.) pollen”
Claim · model-written summary
Germinability of mature pistachio pollen severely decreased after desiccation.
- Taxon
- pistachioPistacia verat0
- Organ / stage
- pollent0
- Treatment
- 48 h desiccatione0
- Outcome
- germinabilitye0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after 48 h desiccation along with severe decrease in germinability.”
t0“pistachio (Pistacia vera L.) pollen”
Claim · model-written summary
A low proportion of pistachio pollen grains had vegetative cell rupture caused by desiccation.
- Taxon
- pistachioPistacia verat0
- Organ / stage
- pollen grainse0
- Treatment
- desiccatione0
- Outcome
- vegetative cell rupturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a low rate of pollen grains have vegetative cell rupture caused by desiccation”
t0“pistachio (Pistacia vera L.) pollen”
Claim · model-written summary
A higher proportion of pistachio pollen grains remained intact in appearance after desiccation.
- Taxon
- pistachioPistacia verat0
- Organ / stage
- pollent0
- Outcome
- grains were intact in appearancee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a higher rate of grains were intact in appearance.”
t0“pistachio (Pistacia vera L.) pollen”
Claim · model-written summary
Numerous amyloplasts persisted in pistachio pollen after desiccation.
- Taxon
- pistachioPistacia verat0
- Organ / stage
- pollent0
- Treatment
- desiccatione0
- Outcome
- Numerous amyloplasts persistede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Numerous amyloplasts persisted after desiccation”
t0“pistachio (Pistacia vera L.) pollen”
Claim · model-written summary
A 16 kDa dehydrin band was detected at higher content in desiccated than fresh pistachio pollen.
- Taxon
- pistachioPistacia verat0
- Organ / stage
- pollent0
- Treatment
- desiccatede0
- Gene
- dehydrine0
- Outcome
- dehydrin bande0
- Direction
- highere0
- Value
- 16 kDae0
- Comparator
- fresh samplese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A 16 kDa dehydrin band was detected by western blot method with higher content in desiccated than fresh samples.”
t0“pistachio (Pistacia vera L.) pollen”
Claim · model-written summary
Total phenolics content increased slightly after pistachio pollen desiccation.
- Taxon
- pistachioPistacia verat0
- Organ / stage
- pollent0
- Treatment
- desiccatione0
- Outcome
- total content of phenolicse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the total content of phenolics increased slightly by desiccation.”
t0“pistachio (Pistacia vera L.) pollen”
Claim · model-written summary
The authors infer that dehydrin and phenolics accumulation was insufficient for pistachio pollen desiccation tolerance.
- Taxon
- pistachioPistacia verat0
- Organ / stage
- pollent0
- Gene
- dehydrine0
- Compound
- phenolicse0
- Outcome
- desiccation tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results indicate the insufficiency of dehydrin and phenolics accumulation for achievement of desiccation tolerance.”
t0“pistachio (Pistacia vera L.) pollen”
Claim · model-written summary
The authors suggest that deficient protective mechanisms may explain severe loss of germinability in desiccated pistachio pollen.
- Taxon
- pistachioPistacia verat0
- Organ / stage
- pollene0
- Outcome
- severe loss of germinabilitye0
- Qualifier
- deficiency in some other protective mechanismse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the severe loss of germinability in desiccated pistachio pollen may be the result of deficiency in some other protective mechanisms”
t0“pistachio (Pistacia vera L.) pollen”
The same questions in other papers
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- negative
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4 papers in the same direction as this paper
- negative
- negative
- negative
1 paper more in this group
See all 5 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.