Desiccation tolerance in the vegetative tissues of the fern Mohria caffrorum is seasonally regulated

Autor: Arnaud Lehner, Stefan Wiswedel, Jill M. Farrant, Keren Cooper
Přispěvatelé: University of Cape Town, Laboratoire de Glycobiologie et Matrice Extracellulaire Végétale (Glyco-MEV), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)
Jazyk: angličtina
Rok vydání: 2009
Předmět:
Chlorophyll
0106 biological sciences
[SDV.BIO]Life Sciences [q-bio]/Biotechnology
fern
Plant Science
[SDV.BC.BC]Life Sciences [q-bio]/Cellular Biology/Subcellular Processes [q-bio.SC]
01 natural sciences
Antioxidants
Desiccation tolerance
South Africa
chemistry.chemical_compound
Dry season
[SDV.BC.IC]Life Sciences [q-bio]/Cellular Biology/Cell Behavior [q-bio.CB]
Raffinose
[SDV.BDD.GAM]Life Sciences [q-bio]/Development Biology/Gametogenesis
0303 health sciences
Dehydration
Plant physiology
[SDV.BBM.MN]Life Sciences [q-bio]/Biochemistry
Molecular Biology/Molecular Networks [q-bio.MN]
protection
Adaptation
Physiological
Droughts
Seasons
Fern
Frond
seasonal regulation
Carbohydrates
Biology
03 medical and health sciences
[SDV.BBM.GTP]Life Sciences [q-bio]/Biochemistry
Molecular Biology/Genomics [q-bio.GN]
Botany
Genetics
[SDV.BBM.BC]Life Sciences [q-bio]/Biochemistry
Molecular Biology/Biochemistry [q-bio.BM]
Ecosystem
030304 developmental biology
desiccation‐sensitive
Water
[SDV.BBM.BM]Life Sciences [q-bio]/Biochemistry
Molecular Biology/Molecular biology
Cell Biology
15. Life on land
biology.organism_classification
[SDV.BV.PEP]Life Sciences [q-bio]/Vegetal Biology/Phytopathology and phytopharmacy
Plant Leaves
desiccation‐tolerant
[SDV.BV.AP]Life Sciences [q-bio]/Vegetal Biology/Plant breeding
[CHIM.POLY]Chemical Sciences/Polymers
chemistry
Ferns
Desiccation
010606 plant biology & botany
Zdroj: Plant Journal
Plant Journal, Wiley, 2009, 57 (1), pp.65-79. ⟨10.1111/j.1365-313X.2008.03673.x⟩
ISSN: 0960-7412
1365-313X
Popis: International audience; As there is limited information on the mechanisms of vegetative desiccation tolerance in pteridophytes, we undertook a comprehensive anatomical, ultrastructural, physiological and biochemical study on the fern Mohria caffrorum. Our data show that this species is desiccation‐tolerant during the dry season, and desiccation‐sensitive in the rainy season. This system allows the verification of protection mechanisms by comparison of tolerant and sensitive tissues of the same species at the same developmental age. Tolerant fronds acquire protection mechanisms during drying that are mostly similar to those reported for angiosperms. These include: (i) chlorophyll masking by abaxial scales and frond curling; (ii) increased antioxidant capacity that is maintained in dry tissues; (iii) mechanical stabilization of vacuoles in the dry state; (iv) de novo production of heat stable proteins (at least one identified as a putative chaperonin); (v) accummulation of protective carbohydrates (sucrose, raffinose family oligosaccharides and cyclitols). This study has implications for the biotechnological production of drought‐tolerant crops, and allows speculation on the evolution of vegetative desiccation tolerance.
Databáze: OpenAIRE
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