Neighborhood Models of Clonal Growth in the White Clover Trifolium repens

Leaf senescence is a programmed event where resources are mobilised from older tissues to the meristematic regions of the plant. In white clover (Trifolium repens L.), leaf and stolon senescence have an important impact on the persistence of the legume in pasture. As part of our investigation of leaf senescence, we have evidence for a central role for the plant hormone ethylene and have identified genes encoding ethylene biosynthetic enzymes. In this paper we include data showing some physiological changes as leaf tissue undergoes senescence and present evidence for the role of ethylene in regulating this process. Keywords: chlorophyll, ethylene, senescence, stolon, leaf, Trifolium repens L.

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Highways for internal virus spread: patterns of virus movement in the stoloniferous herb Trifolium repens

Botany ◽

10.1139/b11-044 ◽

2011 ◽

Vol 89 (8) ◽

pp. 573-579 ◽

Cited By ~ 1

Author(s):

Tamara van Mölken ◽

Thomas Sundelin ◽

Reinier Snetselaar ◽

Josef F. Stuefer

Keyword(s):

Mosaic Virus ◽

White Clover ◽

Trifolium Repens ◽

Resource Sharing ◽

Clonal Growth ◽

Physiological Integration ◽

Disease Development ◽

Virus Spread ◽

Leaf Ontogeny ◽

White Clover Mosaic Virus

Resource sharing between connected ramets can be advantageous for clonal plants. However, widespread vascular integration bears the risks of enhanced internal pathogen spread, which may be one of the most prominent disadvantages of clonal growth. In this paper we analyzed patterns of internal virus spread in ramet groups of the stoloniferous herb Trifolium repens L. (white clover) and investigated the effect of leaf ontogeny on intraclonal disease development. We inoculated single leaves of T. repens with White clover mosaic virus and analyzed the infection status of ramets at different distances from the point of infection and in leaves from different developmental stages. White clover mosaic virus infected all young developing plant parts positioned on basal branches or on the main stolon. Leaf ontogeny strongly affected disease development, and fully mature leaves on the main stolon remained virus free. The pattern of plant-internal virus spread was not affected by heterogeneous light conditions. Despite the well-described advantages of physiological integration, our data suggest that clonal integration may lead to negative selection pressures on clonal growth in pathogen-prone environments.

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Short-term effects of manipulating the source:sink ratio of white clover (Trifolium repens) plants on export of carbon from, and morphology of, developing leaves

Physiologia Plantarum ◽

10.1034/j.1399-3054.1990.800216.x ◽

1990 ◽

Vol 80 (2) ◽

pp. 262-266 ◽

Cited By ~ 1

Author(s):

D. F. Chapman ◽

M. J. Robson ◽

R. W. Snaydon

Keyword(s):

White Clover ◽

Trifolium Repens ◽

Short Term ◽

Short Term Effects

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THE PERFORMANCE OF S170 TALL FESCUE IN CANTERBURY

Proceedings of the New Zealand Grassland Association ◽

10.33584/jnzg.1974.36.1401 ◽

1974 ◽

pp. 214-215

Author(s):

B.R. Watkin

Keyword(s):

New Zealand ◽

White Clover ◽

Tall Fescue ◽

Trifolium Repens ◽

Festuca Arundinacea ◽

Sheep Grazing ◽

Selection Of

AN Aberystwyth selection of tall fescue (Festuca arundinacea Schreb.), known as S170, was sown with certified New Zealand white clover (Trifolium repens) and re' clover (T. pratense) and compared under sheep grazing with other grass/clover pastures at the Grasslands Division Regional Station at Lincoln (Watkin, 1975) .

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