Rôle de la position de la feuille dans l'assimilation et le transport du carbone chez le trèfle blanc (<i>Trifolium repens</i> L.)

Robin, Christophe; Chone, Thérèse; Guckert, Armand

doi:10.1051/agro:19870807

Cited by 12 publications

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“…Grasslands Huia originated from New Zealand, whereas AberHerald was developed from material collected in the Zurich Oberland of the Swiss Alps. AberHerald is characterized by winter hardiness and good spring growth (Rhodes and Fothergill, 1992) Sixty stolon tips of each cultivar were planted individually in a potting mixture (300 g kg −1 sand and 700 g kg −1 peat) in 10‐ by 10‐ by 10‐cm plastic containers. The stolon tips had an apical bud and two nodes on which the youngest expanding leaf was kept.…”

Section: Methodsmentioning

confidence: 99%

“…Collins et al (1991) have shown a considerable degree of genetic variation in the ability of white clover to overwinter and regrow in spring. AberHerald white clover, bred at IGER Aberystwyth from lines collected in the Zurich Oberland of the Swiss Alps, is known to be tolerant to low temperature and shows good spring regrowth potential (Rhodes and Fothergill, 1992; Collins et al 1996; Caradus and Woodfield, 1997). However, we still do not clearly understand the plant characters and physiological mechanisms that explain the differential responses of cultivars to cold hardiness.…”

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confidence: 99%

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Regrowth of White Clover after Chilling: Assimilate Partitioning and Vegetative Storage Proteins

et al. 1999

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Under temperate climates, grassland species are subjected to overwintering which may significantly influence their early spring growth capacity. In white clover (Trifolium repens L.), it is known that overwintering capacity can differ among cultivars. Ability of this forage legume to recover from winter damage will, therefore, have a great influence on its persistence in grass–clover associations. Experiments were undertaken with two different white clover cultivars (Huia and AberHerald). Leaf appearance rate, dry matter distribution, 14C assimilate partitioning, and vegetative storage protein accumulation were determined in plants subjected to a 4‐wk chilling period (5/0°C, day/night) and subsequent warmer temperatures (15/10°C), and compared with control plants (20/15°C). Chilling treatment decreased leaf appearance rate, with AberHerald producing more leaves than Huia. This can be considered as a major aspect of cold adaptation strategy because leaf appearance rate controlled carbon acquisition. Low temperature increased dry matter partitioning to below‐ground tissues. AberHerald allocated more assimilates to stolons than Huia. Accumulation of a 17.3‐kDa protein, believed to act as a vegetative storage protein, also increased after the chilling treatment. Regrowth was characterized by rapid mobilization of the 17.3‐kDa protein in stolons and by preferential carbon allocation to stolon apices. AberHerald showed a higher regrowth potential than Huia in view of its morphological and physiological characters which include carbon acquisition and assimilate partitioning patterns, favoring shoot regrowth and acquisition of stolon reserves.

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Section: Methodsmentioning

confidence: 99%

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confidence: 99%