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Seed bank persistence and germination of chinee apple (Ziziphus mauritiana Lam.)

Bebawi, Faiz F. and Campbell, Shane D. and Mayer, Robert J. (2016) Seed bank persistence and germination of chinee apple (Ziziphus mauritiana Lam.). The Rangeland Journal . ISSN 1036-9872

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Article Link(s): http://dx.doi.org/10.1071/RJ15104

Abstract

Chinee apple (Ziziphus mauritiana Lam.) is a thorny tree that is invading tropical woodlands of northern Australia. The present study reports three experiments related to the seed dynamics of chinee apple. Experiment 1 and 2 investigated persistence of seed lots under different soil types (clay and river loam), levels of pasture cover (present or absent) and burial depths (0, 2.5, 10 and 20 cm). Experiment 3 determined the germination response of chinee apple seeds to a range of alternating day/night temperatures (11/6°C up to 52/40°C). In the longevity experiments (Expts 1 and 2), burial depth, soil type and burial duration significantly affected viability. Burial depth had the greatest influence, with surface located seeds generally persisting for longer than those buried below ground. Even so, no viable seeds remained after 18 and 24 months in the first and second experiment, respectively. In Expt 3 seeds of chinee apple germinated under a wide range of alternating day/night temperatures ranging from 16/12°C to 47 /36°C. Optimal germination (77%) occurred at 33/27°C and no seeds germinated at either of the lowest (11/6°C) or highest (52/40°C) temperature regimes tested. These findings indicated that chinee apple has the potential to expand its current distribution to cooler areas of Australia. Control practices need to be undertaken for at least two years to exhaust the seed bank.

Item Type:Article
Business groups:Biosecurity Queensland
Keywords:burial depth, germination requirements, Indian jujube, seed longevity.
Subjects:Science > Botany > Genetics
Plant culture > Seeds. Seed technology
Deposited On:07 Mar 2016 05:19
Last Modified:07 Mar 2016 05:19

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