Effects of high humidity and temperature stress on pollen membrane integrity and pollen vigour in Nicotiana tabacum

Shivanna, K. R. ; Cresti, M. (1989) Effects of high humidity and temperature stress on pollen membrane integrity and pollen vigour in Nicotiana tabacum Sexual Plant Reproduction, 2 (3). pp. 137-141. ISSN 0934-0882

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Official URL: http://www.springerlink.com/content/k3515n51683827...

Related URL: http://dx.doi.org/10.1007/BF00192759

Abstract

The prolonged exposure of pollen Nicotiana tabacum to high humidity at both room temperature and 38°C did not affect membrane integrity as revealed by the fluorochromatic reaction (FCR) test, but did affect pollen vigour. At room temperature germination was not affected, although tube growth was reduced; at 38°C, there was both a reduction in tube growth and delayed germination. When the pollen was subjected to 1 h hydration followed by 1 h desiccation (up to a maximum of four cycles) at room temperature, a reduction in the FCR, germination and tube length after each desiccation treatment was observed. Subsequent hydration fully restored the FCR, but only partially restored germination and tube growth. At 38°C, however, FCR, germination, and tube growth were drastically reduced. The implications of these results on the relationship between FCR and germinability, the responses of pollen exposed to humidity and temperature stress in the field, and on pollen storage are discussed.

Item Type:Article
Source:Copyright of this article belongs to Springer.
Keywords:Humidity; Temperature Stress; Nicotiana tabacum; Pollen Germination; Pollen Membrane
ID Code:49021
Deposited On:19 Jul 2011 07:20
Last Modified:19 Jul 2011 07:20

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