scholarly journals Leaf senescence and clonal growth of white clover

1996 ◽  
Vol 6 ◽  
pp. 171-173
Author(s):  
S.M. Butcher ◽  
D.W. Fountain ◽  
M.T. Mcmanus
Keyword(s):  
Leaf Senescence ◽  
White Clover ◽  
Trifolium Repens ◽  
Clonal Growth ◽  
Plant Hormone ◽  
Leaf Tissue ◽  
Physiological Changes ◽  
Genes Encoding ◽  
Trifolium Repens L

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.

Influence of Light on Assimilate Partitioning in White Clover (Trifolium repens L.)

1993 ◽  
Vol 20 (3) ◽  
pp. 323 ◽  
Author(s):  
SV Pasumarty ◽  
DW Fountain
Keyword(s):  
Distribution Pattern ◽  
White Clover ◽  
Trifolium Repens ◽  
Assimilate Partitioning ◽  
Trifolium Repens L ◽  
The Relationship ◽  
Clover Plant

In order to identify factors which might contribute to the premature abortion of young inflorescences of white clover Trifolium repens L. in low irradiances, a study was made of the possible role of limiting photosynthetic assimilates to the developing inflorescence. The relationship between the irradiance and distribution pattern of assimilates in the clover plant under different irradiances was determined. Besides driving the photosynthetic supply of sucrose, light seems to play an indirect role in controlling partitioning of photoassimilates. Under low irradiance, the growing tip of the shoot and roots were major sinks and negligible amounts of 14C-labelled assimilates were supplied to the inflorescence. In medium and high irradiances, the inflorescence competes for assimilates with stolon apex and roots.

scholarly journals PERFORMANCE OF WHITE CLOVER AND LOTUS CULTIVARS AND LINES ON THE EAST OTAGO PLATEAU

1989 ◽  
pp. 189-196
Author(s):  
J.M. Keoghan ◽  
W.J. Fraser ◽  
R.P. Heenan
Keyword(s):  
White Clover ◽  
Trifolium Repens ◽  
Frost Damage ◽  
Low Fertility ◽  
Yield Spread ◽  
Tussock Grassland ◽  
Lotus Pedunculatus ◽  
Trifolium Repens L ◽  
Infertile Soils

The performance of 55 Lotus pedunculatus Cav. and 33 Trifolium repens L lines of diverse type and origin was assessed on acid, infertile soils on the East Otago Plateau at 3 sites representing an altitudinal sequence of increasing severity of climate. Among the L pedunculatus lines, a diploid NZ selection 04701 showed the best combination of attributes with high herbage yields, moderate rhizome spread at the highest sites and considerable tolerance to out-of-season frosting. G4701, its tetraploid equivalent G4702 and a selection from within the cultivar 'Grasslands Maku' for rapid germination at low temperatures, produced the highest yields averaged over the 3 sites in the altiludinal sequence. The use of these lines is likely to enhance the role of lotus in tussock grassland pasture systems. Within white clover, a hybrid line C5413. which has been.included in the pre-release Southern white clover cultivar G26. performed well, indicating that it has wide adaptability for both fertile lowland and low-fertility hill and high country situations on the southern South Island. The Southland Selection C5844, which is derived from Southland ecotypes, had the best combination of attributes for the East Otago Plateau. This selection merits serious consideration for release as a 'Tahora-like' cultivar for moist, infertile hill and high country in the southern South Island. Keywords: Trifolium repens, Lotus pedunculatus. evaluation, herbage yield, spread, dominance, frost damage, South Island.

Honeybee pollination of white clover (Trifolium repens L.) cv. Haifa

1994 ◽  
Vol 34 (8) ◽  
pp. 1121 ◽  
Author(s):  
RD Goodman ◽  
AE Williams
Keyword(s):  
Apis Mellifera ◽  
Seed Yield ◽  
White Clover ◽  
Trifolium Repens ◽  
Native Bees ◽  
Flowering Period ◽  
Trifolium Repens L ◽  
Seed Yields ◽  
Insect Visitors

The role of honeybees (Apis mellifera) in the pollination of white clover cv. Haifa was studied in a commercial planting at Mount Mercer, Victoria. Honeybees comprised 88% of all insect visitors to this crop. The activity of honeybees and native bees (Lasioglossum sp.) increased seed yield from 1.3 g/plot (plots closed to bees) to 40.3 g/plot (plots open to bees). The caging of plots for part of the flowering period to simulate the non-availability of bees for pollination resulted in lower seed yields than those from uncaged plots.

scholarly journals Programmed chloroplast destruction during leaf senescence involves 13-lipoxygenase (13-LOX)

2016 ◽  
Vol 113 (12) ◽  
pp. 3383-3388 ◽  
Author(s):  
Armin Springer ◽  
ChulHee Kang ◽  
Sachin Rustgi ◽  
Diter von Wettstein ◽  
Christiane Reinbothe ◽  
...  
Keyword(s):  
Leaf Senescence ◽  
Critical Role ◽  
Transit Peptide ◽  
Physiological Changes ◽  
Pathogen Defense ◽  
Chloroplast Transit Peptide ◽  
Selective Destruction ◽  
Plastid Envelope ◽  
Volatile Aldehydes

Leaf senescence is the terminal stage in the development of perennial plants. Massive physiological changes occur that lead to the shut down of photosynthesis and a cessation of growth. Leaf senescence involves the selective destruction of the chloroplast as the site of photosynthesis. Here, we show that 13-lipoxygenase (13-LOX) accomplishes a key role in the destruction of chloroplasts in senescing plants and propose a critical role of its NH2-terminal chloroplast transit peptide. The 13-LOX enzyme identified here accumulated in the plastid envelope and catalyzed the dioxygenation of unsaturated membrane fatty acids, leading to a selective destruction of the chloroplast and the release of stromal constituents. Because 13-LOX pathway products comprise compounds involved in insect deterrence and pathogen defense (volatile aldehydes and oxylipins), a mechanism of unmolested nitrogen and carbon relocation is suggested that occurs from leaves to seeds and roots during fall.

An SSR and AFLP molecular marker-based genetic map of white clover (Trifolium repens L.)

Plant Science ◽  
2003 ◽  
Vol 165 (3) ◽  
pp. 531-539 ◽  
Author(s):  
Elizabeth S. Jones ◽  
Leonie J. Hughes ◽  
Michelle C. Drayton ◽  
Michael T. Abberton ◽  
Terry P.T. Michaelson-Yeates ◽  
...  
Keyword(s):  
Molecular Marker ◽  
Genetic Map ◽  
White Clover ◽  
Trifolium Repens ◽  
Trifolium Repens L

Validation of in silico-predicted genic SNPs in white clover (Trifolium repens L.), an outbreeding allopolyploid species

2007 ◽  
Vol 277 (4) ◽  
pp. 413-425 ◽  
Author(s):  
N. O. I. Cogan ◽  
M. C. Drayton ◽  
R. C. Ponting ◽  
A. C. Vecchies ◽  
N. R. Bannan ◽  
...  
Keyword(s):  
White Clover ◽  
Trifolium Repens ◽  
In Silico ◽  
Trifolium Repens L
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