Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
The functional morphology of the petioles of the banana, Musa textilis
Autore:
Ennos, AR; Spatz, HC; Speck, T;
Indirizzi:
Univ Manchester, Sch Biol Sci, Manchester M13 9PT, Lancs, England Univ Manchester Manchester Lancs England M13 9PT M13 9PT, Lancs, England Univ Freiburg, Inst Biol 3, D-79104 Freiburg, Germany Univ Freiburg Freiburg Germany D-79104 Biol 3, D-79104 Freiburg, Germany Univ Freiburg, Bot Garten, D-79104 Freiburg, Germany Univ Freiburg Freiburg Germany D-79104 Garten, D-79104 Freiburg, Germany
Titolo Testata:
JOURNAL OF EXPERIMENTAL BOTANY
fascicolo: 353, volume: 51, anno: 2000,
pagine: 2085 - 2093
SICI:
0022-0957(200012)51:353<2085:TFMOTP>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
BIOMECHANICS;
Keywords:
banana; petiole; mechanics; buckling; torsion;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Ennos, AR Univ Manchester, Sch Biol Sci, 3-614 Stopford Bldg,Oxford Rd, Manchester M13 9PT, Lancs, England Univ Manchester 3-614 Stopford Bldg,OxfordRd Manchester Lancs England M13 9PT
Citazione:
A.R. Ennos et al., "The functional morphology of the petioles of the banana, Musa textilis", J EXP BOT, 51(353), 2000, pp. 2085-2093

Abstract

Bananas are among the largest herbs in the world and their lightweight petioles hold up huge leaves, This study examined how the petioles manage to achieve adequate rigidity to do this, while allowing extensive and reversible reconfiguration in high winds. Morphological and anatomical examination of the petioles and leaves of Mesa textilis suggested how these two apparently incompatible abilities are achieved. The hollow U-shaped section of the petiole and the longitudinal strengthening elements in its outer skin give it adequate rigidity, while its ventral curvature help support the leaf without the need for thick lateral veins. These features, however, also allow the petiole to reconfigure by twisting away from the wind, while the leaf can fold away. In addition, two sets of internal structures, longitudinal partitions and transverse stellate parenchyma plates, help prevent dorsoventral flattening, allowing the petiole to flex further away from the wind without buckling. These ideas were tested and verified by a range of mechanicaltests. Simple four-point-bending and torsion tests showed that the petioles are indeed far more compliant in torsion than in bending. Axial bending tests and crushing tests showed that petioles could be flexed twice as far and were four times as resistant to dorsoventral flattening when intact thanwhen the internal tissue is removed, The banana petiole, therefore, seems to be an excellent example of natural integrated mechanical design.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 09:26:42