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Titolo:
Translational and fluctuating asymmetry as tools to detect stress in stress-adapted and nonadapted plants
Autore:
Alados, CL; Navarro, T; Escos, J; Cabezudo, B; Emlen, JM;
Indirizzi:
CSIC, Inst Pirenaico Ecol, E-50080 Zaragoza, Spain CSIC Zaragoza Spain E-50080 Inst Pirenaico Ecol, E-50080 Zaragoza, Spain Univ Malaga, Dept Biol Vegetal, Malaga 29080, Spain Univ Malaga Malaga Spain 29080 a, Dept Biol Vegetal, Malaga 29080, Spain US Geol Survey, Biol Resources Div, Seattle, WA 98115 USA US Geol Survey Seattle WA USA 98115 Resources Div, Seattle, WA 98115 USA
Titolo Testata:
INTERNATIONAL JOURNAL OF PLANT SCIENCES
fascicolo: 3, volume: 162, anno: 2001,
pagine: 607 - 616
SICI:
1058-5893(200105)162:3<607:TAFAAT>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
DEVELOPMENTAL INSTABILITY; SEXUAL SELECTION; FRACTAL ARCHITECTURE; NECTAR SECRETION; STABILITY; FITNESS; INDICATOR; EVOLUTION; SYMMETRY; PATTERNS;
Keywords:
developmental instability; translational asymmetry; fluctuating asymmetry; water deficit; Anthyllis cytisoides L.;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
72
Recensione:
Indirizzi per estratti:
Indirizzo: Alados, CL CSIC, Inst Pirenaico Ecol, Ave Montanana 177,Apartmento 202, E-50080 Zaragoza, Spain CSIC Ave Montanana 177,Apartmento 202 Zaragoza SpainE-50080 n
Citazione:
C.L. Alados et al., "Translational and fluctuating asymmetry as tools to detect stress in stress-adapted and nonadapted plants", INT J PL SC, 162(3), 2001, pp. 607-616

Abstract

Plants having experienced previous exposure to a stress are expected to bemore resistant to further stress than those not having been exposed. Whilethe assessment of stress in plants is a difficult task, particularly for stress-adapted plants, developmental instability has proven a useful tool for assessing stress in organisms. We examined the effect of water availability on developmental instability (translational asymmetry and fluctuating asymmetry) and growth of Anthyllis cytisoides L. under a precipitation gradient. We compared A. cytisoides in very xeric (Almeria, 256 mm of average rainfall) and subhumid (Malaga, 613 mm of average rainfall) areas, from north-and south-facing slopes, after both a period of extreme drought (1995) anda humid period (1997). Translational symmetry varied between north- and south-exposed plants but differently for the Almeria and Malaga populations. We observed that developmental stability was enhanced in south-exposed plants in the population from the more xeric habitat (Almeria) after both dry and humid periods. In contrast, A. cytisoides living in a subhumid habitat did not alter their developmental stability in response to exposure after a humid period but exhibited a decline in stability in south-exposed slopes after a dry period. That is interpreted as a consequence of the adaptation of A. cytisoides to aridity. Growth patterns were also investigated. By reducing growth, plants can mitigate stress through a reduction of water and nutrient demands, allowing the maintenance of a steady supply of nutrients for developmental stability. This strategy was followed by plants acclimated to drought. But in mild weather, such as that of Montes de Malaga, a high growth rate cannot be supported when water is scarce. We also observed that floral fluctuating asymmetry was greatest on north- facing slopes at both the Almeria and Malaga sites. That is, southern exposure enhanced floral homeostasis during development. Additionally, comparisons between translational and fluctuating asymmetry showed that translational asymmetry is more sensitive to environmental change than fluctuating asymmetry.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/01/20 alle ore 03:43:03