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Regeneration of Chloroplast Structure in Talbotia elegans: A Desiccation- Tolerant Plant

N. D. Hallam and D. F. Gaff
The New Phytologist
Vol. 81, No. 3 (Nov., 1978), pp. 657-662
Published by: Wiley on behalf of the New Phytologist Trust
Stable URL: http://www.jstor.org/stable/2433860
Page Count: 9
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Regeneration of Chloroplast Structure in Talbotia elegans: A Desiccation- Tolerant Plant
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Abstract

Talbotia elegans (Velloziaceae) is a desiccation-tolerant plant whose dry leaves contain chlorophyll. The plastids of dry viable leaves retain some semblance of thylakoid structure and organization but are in a loose array. This contrasts with desiccation-tolerant plants that lose chlorophyll during dehydration and reduce the chloroplast to pro-plastid like bodies containing vesicles and numerous plastoglobuli. During rehydration, the existing thylakoid stacks are rehabilitated by the production of a `chloroplast designate' volume surrounding the mass of thylakoids. This region is delimited by a double membrane and the thylakoids stack to form grana and intergranal lamellae by 24 h of hydration. Few organelles other than the chloroplast initials are easily recognizable in dry leaves but mitochondria, reduced to membrane-bound sacs in the dry state, reform cristae after full hydration has been achieved.

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