Some factors that may influence the invasiveness of Mikania micrantha Kunth. ex. H.B.K. in Fiji

Macanawai, A. R., Day, M. D., Tumaneng-Diete, T. and Adkins, S. W. (2010). Some factors that may influence the invasiveness of Mikania micrantha Kunth. ex. H.B.K. in Fiji. In: S. M. Zydenbos, Proceedings of the Seventeenth Australasian Weed Conference (2010) - New Frontiers in New Zealand: Together we can beat the weeds. Seventeenth Australasian Weeds Conference (2010), Christchurch, New Zealand., (95-98). 26-30 September 2010..

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Author Macanawai, A. R.
Day, M. D.
Tumaneng-Diete, T.
Adkins, S. W.
Title of paper Some factors that may influence the invasiveness of Mikania micrantha Kunth. ex. H.B.K. in Fiji
Formatted title
Some factors that may influence the invasiveness of Mikania micrantha Kunth. ex. H.B.K. in Fiji
Conference name Seventeenth Australasian Weeds Conference (2010)
Conference location Christchurch, New Zealand.
Conference dates 26-30 September 2010.
Proceedings title Proceedings of the Seventeenth Australasian Weed Conference (2010) - New Frontiers in New Zealand: Together we can beat the weeds
Place of Publication Christchurch, New Zealand
Publisher New Zealand Plant Protection Society
Publication Year 2010
Sub-type Fully published paper
Editor S. M. Zydenbos
Start page 95
End page 98
Total pages 4
Language eng
Formatted Abstract/Summary
A study was undertaken to predict the
tolerance and persistence of Mikania micrantha Kunth
ex H.B.K. seed in the soil seed bank in Viti Levu, Fiji.
A laboratory-controlled ageing test (LCAT) indicated
that M. micrantha seed would likely survive in the
soil seed bank for between 1 and 3 years. A second
study was conducted to determine the effect of sodium
chloride (NaCl), at concentrations similar to those occurring
naturally in the soils of Viti Levu, Fiji, on the
germination rate and root development of M. micrantha.
Average percent germination in the controls was
>93% and this occurred within 5 days of the start of
incubation (30/15°C ± 1°C, 12 h photoperiod). Moderate
salinity (200mM NaCl) significantly reduced
germination to c. 60% and high salinity (300mM
NaCl) down to 6%. Primary root growth was inhibited
by low concentrations of NaCl (25mM). However, in
such treatments, seedlings survived by producing a
high density, shallow fibrous root system around their
stem bases. Thus, seedling establishment could occur
even in moderate levels of NaCl. This implies that
M. micrantha can tolerate moderate salinity conditions
and may be able to grow in areas where other
weed species cannot grow so well. Both studies have
identified components of the adaptive mechanism
employed by M. micrantha in invading agricultural
land in Viti Levu. This knowledge on seed longevity
and salt tolerance could facilitate the development of
management plans of this weed in Fiji.
Keyword Sodium chloride (NaCl)
Salinity
Laboratory-controlled ageing test (LCAT)
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collection: School of Agriculture and Food Sciences
 
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Created: Wed, 09 Mar 2011, 11:29:00 EST by Apaitia Ravaga Macanawai on behalf of School of Agriculture and Food Sciences