Table 1 Categorization of pollen grains into different morphological subtypes.
From: Evaluation of methods to assess the quality of cryopreserved Solanaceae pollen
Category | Description | Example image |
|---|---|---|
Aberrant | Aberrant grains have been associated with abortion of the microspore development, e.g. due to heat stress29,30 |
|
Dehydrated | Pollen failing to morphologically reconstitute after rehydration and suspension in the germination buffer. Furrows can clearly be identified, resembling a “coffee bean”. See Fig. 1a–I |
|
Reconstituted, not germinated | This category comprises pollen grains which were morphologically reconstituted by rehydration and suspension in germination buffer but did not form a pollen tube. See Fig. 1a–II |
|
Reconstituted, pollen tube emerging | These pollen grains formed a pollen tube, but the tube length was shorter than the pollen’s diameter |
|
Reconstituted, pollen tube longer than pollen diameter | These pollen grains formed pollen tubes with tubes longer than the pollen diameter |
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