Experimental reintroduction of the threatened terrestrial orchid Diuris fragrantissima

Smith, Zoë F.; James, Elizabeth A.; McLean, Cassandra B.

doi:10.15517/lank.v7i1-2.19569

Cited by 6 publications

(8 citation statements)

References 3 publications

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“…There were significant differences in average fresh weight of germinated seeds (Figure 5B), average developmental stage (Figure 5C), proportions of seeds with high developmental stage (stage 6) (Figure 5D, E) and shriveled seeds (Table 1) between self-pollination and nectar addition under the conditions of symbiotic and asymbiotic cultures, suggesting that nectar addition partially results in geitonogamy. It is important for orchids to reach higher developmental stage faster under natural conditions to enhance its survival and resistance to disadvantageous environmental and climate conditions (Smith et al, 2007;Stewart, 2008). Based on this conclusion, and combined with our study results, it is confirmed that germinated seeds after cross-pollination and natural conditions have higher ability to adapt to the environment than that after self-pollination and nectar addition.…”

Section: Discussionmentioning

confidence: 99%

Ecological significance of deceptive pollination in Papilionanthe teres

Yang

Zhou

2022

Preprint

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Though some hypotheses have obtained theoretical and empirical supports, it remains largely unknown in the aspect that how deception increases orchid fitness. This study used food-deceptive Papilionanthe teres as experimental material to explore the ecological significance of orchid deceptive pollination. Deception together with obvious pollinarium bending increases P. teres fitness by means of decreasing geitonogamy under the natural conditions. The proportions of full seeds, single fruit weight and seed weight per fruit after self-pollination and nectar addition were significantly lower than that after cross-pollination and natural conditions (all p ＜ 0.05). Seed viability (seed growth and development rate) after cross-pollination and natural condition were significantly higher than that after self-pollination and nectar addition (all p ＜ 0.05). However, there was no significant difference in all the above parameter values of fruits and seeds between cross-pollination and natural conditions (all p ＞ 0.05). These results confirmed that P. teres has high level of genetic load, and self-fertilization or geitonogamy will cause serious inbreeding depression. These conclusions support the outcrossing hypothesis that ecological significance of P. teres deception is to promote outcrossing and improve the ability of the offspring to adapt to the environment.

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Section: Discussionmentioning

confidence: 99%

Ecological significance of deceptive pollination in Papilionanthe teres

Yang

Zhou

2022

Preprint

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“…Smith et al . (2007) have noted that soil aeration through tilling may encourage persistence of mycorrhizal fungi in soils previously compacted through agricultural practices, and hence the reworking of soil through the practice of mine rehabilitation has likely improved micro‐habitat for these fungi.…”

Section: Discussionmentioning

confidence: 99%

“…As in this case, such a situation can be averted by translocating fungi within soil cores with translocated orchids, allowing them to spread within replaced topsoil. Smith et al (2007) have noted that soil aeration through tilling may encourage persistence of mycorrhizal fungi in soils previously compacted through agricultural practices, and hence the reworking of soil through the practice of mine rehabilitation has likely improved micro-habitat for these fungi.…”

Section: Discussionmentioning

confidence: 99%

Successful recruitment following translocation of a threatened terrestrial orchid (Diuris tricolor) into mining rehabilitation in the Hunter Valley of NSW

Bell

2021

Eco Management Restoration

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Summary Translocation of threatened terrestrial orchids is increasingly seen as a viable ameliorative conservation option when habitat is destroyed or modified through changing land use. Most orchid translocations reported in the literature detail nursery‐raised seedlings planted into intact and suitable habitat, and few involve translocation of entire plants and their mycorrhizal fungal associates. As part of a larger translocation study, soil cores containing 46 individuals of the threatened Painted Diuris (Diuris tricolor) were translocated into herbivore‐proof plots on restored and rehabilitated post‐mining lands in the Hunter Valley of New South Wales. After 3 years of annual flowering and fruiting, new recruits (mature flowering plants) were observed within translocation plots but outside of original soil cores, and at 6 years following translocation 29 new individuals were observed. Two of these individuals germinated outside of fenced plots. At peak flowering in 2020, a search of rehabilitated lands outside of translocation plots failed to locate any orchids, discounting the unlikely possibility that orchid tubers may have survived the process of topsoil stockpiling and respreading. Successful recruitment of Painted Diuris into mining rehabilitation has the potential to significantly offset any losses of this species resulting from mining operations within the region.

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“…Several Sunshine Diuris reintroductions were conducted within the Port Phillip Region of Victoria by DSE with Parks Victoria, ANOS and local government. A major reintroduction trial of 700 plants was conducted as part of a PhD (Smith et al 2007), which focused on why previous reintroductions of the species were apparently unsuccessful.…”

Section: Sunshine Diuris (Diuris Fragrantissima)mentioning

confidence: 99%

“…Research is the key to conducting successful orchid conservation projects within Victoria. The RBGM in conjunction with several Universities and DSE has hosted many postgraduate projects on orchid conservation (Marvern, 1996;Wright 2007;Smith et a/ 2007). Recently collaborations between Melbourne University, RMIT University, the Wimmera CMA (WCMA) and the RBGM have explored taxonomic relationships of some of the orchid mycorrhiza.…”

Section: Introductionmentioning

confidence: 99%

Victorian orchid conservation

Reiter,

Thomson,

Anderton

et al. 2013

Australasian Plant Conservation: Journal of the Australian Network for Plant Conservation

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Experimental reintroduction of the threatened terrestrial orchid Diuris fragrantissima

Cited by 6 publications

References 3 publications

Ecological significance of deceptive pollination in Papilionanthe teres

Ecological significance of deceptive pollination in Papilionanthe teres

Successful recruitment following translocation of a threatened terrestrial orchid (Diuris tricolor) into mining rehabilitation in the Hunter Valley of NSW

Victorian orchid conservation

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