Provenance effects on pre-germination treatments for Eucalyptus regnans and E. delegatensis seed

Close, DC; Wilson, SJ

doi:10.1016/s0378-1127(01)00768-x

Cited by 32 publications

(27 citation statements)

References 20 publications

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“…Such early life adaptations have been reported in other plant species (Giménez-Benavides et al 2007;Donohue et al 2010), including early or rapid germination to avoid drought stress (Allen and Meyer 1998;Verslues and Juenger 2011). In eucalypts, while the stratification requirements of higher altitude provenances of many species are well-known from native forest seed collections (Close and Wilson 2002), adaptation of species germination traits to drought and high temperatures has been poorly studied.…”

Section: Discussionmentioning

confidence: 96%

Genetic control of Eucalyptus globulus seed germination

Rix

Gracie

Potts

et al. 2015

Annals of Forest Science

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Abstract& Key message The maternal genotype has a significant effect on most germination traits of Eucalyptus globulus seeds. These differences can be partly explained by genetic-based differences amongst races, including differences in sensitivity to high temperatures which may be of adaptive significance. & Context Slow and uneven germination of Eucalyptus globulus seeds in commercial nurseries can be a problem which has been linked with periods of high temperature. & Aims This study aimed to determine whether maternal genotype affects the germination of E. globulus seeds.& Methods By sampling seeds over two seasons from multiple randomised ramets (trees) of maternal genotypes from three races of E. globulus growing in a seed orchard, the extent of genetic control of seed germination responses was assessed at different germination temperatures. & Results Maternal genotype had a significant effect on most germination traits but a differential response to temperature was more evident for germination proportion than rate traits. Maternal races differed in their rate of seedling development regardless of temperature, but differences in the germination proportion were only detected at high temperatures. & Conclusion The present study highlights the potential adaptive significance of the germination response and the need for seed lot-specific germination testing as both genetics and maternal environment vary.

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Section: Discussionmentioning

confidence: 96%

Genetic control of Eucalyptus globulus seed germination

Rix

Gracie

Potts

et al. 2015

Annals of Forest Science

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“…For example, López et al (2000) showed that the larger seeds of E. globulus germinated better than smaller seeds across a range of temperatures. Close and Wilson (2002) showed that large E. regnans seeds germinated at a faster rate than small seeds, and chilling increased germination rates for high-altitude provenances. Schütz et al (2002) showed that large-seeded species from the south-western Australia are able to penetrate the soil profile faster and deeper.…”

Section: Basic Mechanisms Of Seed Dispersal and Seedling Establishmentmentioning

confidence: 99%

Going nowhere fast: a review of seed dispersal in eucalypts

Booth¹

2017

Aust. J. Bot.

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Abstract. Eucalypt species have several features that make them particularly well suited for climate change studies. A key assumption is that they have very limited powers of dispersal. If this is correct, it means that climate change analyses to the end of this century can concentrate mainly on assessing whether or not eucalypt species are likely to be able to survive at their existing sites. A recent major climate change study of more than 600 eucalypt species for the period 2014-2085 has used 5 km as a usual dispersal limit for the period to 2085, with the possibility of rare long-distance events. The review presented here considers how far natural stands of eucalypt species are likely to be able to migrate in the period to 2085. It is the first review to consider eucalypt seed dispersal as its major focus. It draws on evidence from millions of years ago to the present, and from eucalypt stands in Australia and around the world. Although rare long-distance events cannot be entirely ruled out, it is concluded that the great bulk of the evidence available indicates that the most likely potential dispersal rate is equivalent to about 1-2 m per year, i.e.~70-140 m in the period to 2085. Over decades, this is likely to occur as a series of stepwise events, associated with disturbances such as bushfires. However, limitations such as inadequate remnant eucalypt stands and extensive agricultural developments may reduce actual migration rates below even this modest potential.

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“…It can be seen from Table 2 that the seeds of Sukakarya and Gambung have a smaller size. Close and Wilson [26], Khan [11] and Kuniyal [6] reported that the seeds of the smaller and lighter fruits would have a longer germination rate compared with those of larger and heavier fruits.…”

Section: Germinationmentioning

confidence: 99%

Spatial Variability of Fruit and Seedling Growth of Mindi (Melia azedarach L.) in Community Forest, West Java, Indonesia

Irmayanti

Siregar

Pamoengkas

2015

JTLS

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Mindi (Melia azedarach L.) is mostly found in community forests of West Java. Important factors affecting the productivity of community forests is the use of quality seed. However, seed quality is not easily available. Currently, community forests serve also as ad hoc seed sources that are usually without appropriate quality assessment. This research was aimed to determine baseline information on spatial variability of Mindi fruits collected from five seed sources, and seedling growths treated in seven different growing media consisting mixtures of soil, rice husk, sand, and cattle manure. Five Mindi populations were selected in the following villages: Nagrak (Bogor), Babakan Rema (Kuningan), Padasari (Sumedang), Sukakarya (Bogor) and Gambung (Bandung). The results showed that variability of seed dimension (CV=4.82-14.37%) and seedling growth (11.79-21.77%) were moderate. The Mindi fruits from Nagrak were found to be the biggest in terms of size (1.22 ± 0.17 cm), weight (0.40 ± 0.04 g), and seed set (85.47 ± 15.09%). Besides, the seedling growth from Nagrak was also better than those of other villages showing its potential for future seed sources. Growing media containing cattle manure were observed consistently to be the best for seedling growth. The findings are useful in supporting the selection of seed sources from community forests scientifically.

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Provenance effects on pre-germination treatments for Eucalyptus regnans and E. delegatensis seed

Cited by 32 publications

References 20 publications

Genetic control of Eucalyptus globulus seed germination

Genetic control of Eucalyptus globulus seed germination

Going nowhere fast: a review of seed dispersal in eucalypts

Spatial Variability of Fruit and Seedling Growth of Mindi (Melia azedarach L.) in Community Forest, West Java, Indonesia

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