What question did this study set out to answer?

To identify the physiological factor responsible for overcoming the pollen population effect and evaluate the role of calcium ions in pollen germination and tube elongation.

October 1, 1963American Journal of BotanyOpen Access

The Essential Role of Calcium Ion in Pollen Germination and Pollen Tube Growth

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Authors

JBJ. L. BrewbakerUniversity of Hawaiʻi at Mānoa BKB. H. KwackUniversity of Hawaii System

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Implication

In vitro experimental study reveals that calcium ions rescue germination in 86 plant species, indicating a fundamental regulatory mechanism for pollen tube growth.

Key Points

To identify the physiological factor responsible for overcoming the pollen population effect and evaluate the role of calcium ions in pollen germination and tube elongation.
Assayed in vitro pollen germination and pollen tube elongation across 86 plant species representing 39 families under small and large population conditions.
Tested plant tissue water extracts and varying concentrations of inorganic cations, including Ca2+, K+, Mg2+, and Na+, for their ability to promote pollen growth.
Formulated and evaluated an optimized synthetic liquid culture medium containing sucrose, boric acid, calcium nitrate, magnesium sulfate, and potassium nitrate.
Identified the calcium ion as the active constituent in plant extracts that completely overcomes the in vitro pollen population effect across all 86 tested species.
Established an optimum requirement of 300 to 5,000 ppm Ca(NO3)2·4H2O for pollen growth, with K+, Mg2+, and Na+ ions acting in supporting capacities to facilitate calcium uptake and binding.

Cite This Study

Brewbaker et al. (1963) studied this question.

synapsesocial.com/papers/69dd39bafb7610310c101179 https://doi.org/10.1002/j.1537-2197.1963.tb06564.x

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Implication

In vitro experimental study reveals that calcium ions rescue germination in 86 plant species, indicating a fundamental regulatory mechanism for pollen tube growth.

The Essential Role of Calcium Ion in Pollen Germination and Pollen Tube Growth

Discussion

Member takes

Implication

Key Points

Cite This Study

The Essential Role of Calcium Ion in Pollen Germination and Pollen Tube Growth

Discussion

Member takes

Implication

Key Points

Cite This Study

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