The pollination system and stigmatic cuticle of<i>Clianthus puniceus</i>(Fabaceae)

Heenan, P. B.

doi:10.1080/0028825x.1998.9512571

Cited by 8 publications

(4 citation statements)

References 16 publications

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“…It was reported by Jusaitis (1994) that the stigma of S. formosa is covered by a stigmatic cuticle that prevents pollen germination until ruptured. Such rupture can be induced by increasing fluid pressure in the style (Lord and Heslop-harrison, 1984) or subjecting the cuticle to mechanical disturbance such as visiting by birds (Heenan, 1998), bees (Sigrist and Sazima, 2004) or rubbing the stigma with fingertip (Zulkarnain, 2005), resulting in the rupturing of the cuticle. Although it may not directly correlate to stigma receptivity, misleading predictions of stigma receptivity in S. formosa may occur due to the presence of this cuticle.…”

Section: Stigma Receptivitymentioning

confidence: 99%

Pollen viability and stigma receptivity in Swainsona formosa (G.Don) J.Thompson (Fabaceae), an ornamental legume native to Australia

Ichwan

Eliyanti

Swari

2019

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Pollen viability and stigma receptivity are prerequisites for successful cross-pollination and seed set in Swainsona formosa. In this study, the pollen viabilities and stigma receptivities was assayed by in vitro pollen germination and simple hand-pollination method on glasshouse-grown plants, respectively. The viability of pollen grains was tested under three different storage conditions: 1) pollen grains were left on the plant in the glasshouse under natural conditions, 2) pollen grains were harvested and kept at a low temperature (4 o C) in total darkness, and 3) pollen grains were kept in a dry freezer (-10 o C) and in total darkness. Meanwhile, stigma receptivity was determined by hand-pollination using fresh pollen grains on flower of glasshouse-grown plants at one day before anther dehiscence up to 8 days after anther dehiscence. The results showed that pollen grains could be stored at 4 o C for up to 28 days without significantly losing their viability. Pollen longevity could be extended beyond two months when stored at -10 o C and under dry conditions. These findings provided a simple and economically sound method for storage of S. formosa pollen. In addition, stigma receptivity was found to be receptive from one day before anther dehiscence and reached its peak within four days after anther dehiscence. These results provide a valuable background to the conventional breeding of this species to create hybrids through cross-pollination

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Section: Stigma Receptivitymentioning

confidence: 99%

Pollen viability and stigma receptivity in Swainsona formosa (G.Don) J.Thompson (Fabaceae), an ornamental legume native to Australia

Ichwan

Eliyanti

Swari

2019

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“…In C. puniceus var. maximus, this normally only occurs during visits by honeyeaters, but in C. puniceus the cuticle ruptures spontaneously just prior to senescence, and autonomous selfing results (Heenan 1998). Solanum laciniatum also has a delayed self-fertilisation system involving both herkogamy and dichogamy.…”

Section: Monoecy Herkogamy and Dichogamymentioning

confidence: 99%

Progress in understanding pollination systems in New Zealand

Newstrom

Robertson

2005

New Zealand Journal of Botany

106

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Pollination in New Zealand, an isolated oceanic archipelago in the Southern Hemisphere, has previously been characterised as having low rates of self-incompatibility and a lack of specialised pollination, as well as little pollinator dependence. These features have been interpreted as supportive of "Baker's Rule", which suggests that long-distance colonisation selects for breeding systems that do not require biparental mating. However, we show that recent studies of the angiosperm flora reveal sexual systems (sexual dimorphism, self-incompatibility, monoecy, dichogamy, and herkogamy) that usually involve a dependence on pollen vectors. The level of self-incompatibility in the flora, though still poorly known, should be regarded as moderate rather than unusually low (about 36% of hermaphrodite populations tested are strongly or partially self-incompatible), though many more species remain to be tested. As found elsewhere, incompatibility is higher in the trees and shrubs (around 80%) compared with herbs (21%). Moreover, high rates of autonomous selfing have been demonstrated empirically in only 21% of the self-compatible species, demonstrating that they are not regular selfers. The pollinator dependence that these features impose makes much of the flora vulnerable to declines in pollinator service. B04046; Online publication date 17 March 2005 Received 24 November 2004; accepted 8 February 2005Pollination systems in New Zealand have been characterised as unspecialised, imprecise entomophilous systems that correspond to the predominance of small white or pale flowers with dish or bowl shapes. We use a two-tiered conceptual framework incorporating a coarse-scale blossom class analysis and a finer scale syndrome concept analysis to assess the level of specialisation in plant-pollinator relationships of New Zealand. Within each of the syndromes is a continuum of blossom classes: open-, directed-, and closed-access. Highly specialised systems are found in closed-access blossoms but they are not common in New Zealand (e.g., Solanum, Carmichaelia, orchids, and mistletoes). Large directed-access blossoms are primarily associated with bird pollination but certain small entomophilous blossoms, called "knob" blossoms (Pseudopanax, Geniostoma), are also important for perching birds and may be considered ornithophilous. Bats and lizards play a minor role in pollination. Moth pollination is not well studied and may reveal cryptic specialisation based on scent. The majority of pollination systems in New Zealand correspond to the "small bee syndrome", which is a generalised bee-pollinated system common elsewhere and includes visits from flies and other diverse insects. Naturalised exotic bees may have both positive and negative effects on indigenous pollination systems and could play a significant role in invasive mutualisms in which some weeds are specialised to their services. Future research in New Zealand pollination and breeding systems needs to focus on endangered mutualisms, particularly in birds; on invasive mut...

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“…Like other Fabaceae, L. maculatus has a stigmatic cuticle, preventing the entrance of the pollen tube into the stigma (Owens 1985;Rodríguez-Riaño et al 2004;Valtueña et al 2010;Ojeda & Santos-Guerra 2011). Effective pollination observed in the closely related L. berthelotii, as well as in other Fabaceae, depends on the rupture of the stigmatic cuticle (Heslop-Harrison & Heslop-Harrison 1983;Owens 1985;Heenan 1998). Contact of control flowers with animals might have facilitated cuticle rupture, thus breaking down self-incompatibility and enhancing fruiting success.…”

Section: Discussionmentioning

confidence: 99%

Flower-visiting lizards as key ecological actors for an endemic and critically endangered plant in the Canary Islands

González-Castro,

Siverio

2024

J Poll Ecol

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Oceanic islands are places where biological assemblages are relatively simple, as compared to the mainland. On islands, however, pollinator assemblages may to be composed of a taxonomically disparate group of organisms (e.g. insects, lizards, and birds), some of them with opportunistic nectar-feeding behaviour. Here we investigated some components of pollination effectiveness of Lotus maculatus (Fabaceae), an endangered Canary Islands endemic. In a flower exclusion experiment, we bagged flowers and compared their subsequent fruit and seed set to that of control flowers. Number of interactions with vertebrate and invertebrate flower visitors was counted and it was recorded whether interactions were legitimate (potentially pollinating) or non-legitimate (nectar robbing). Additionally, we estimated pollen loads on lizards and looked for any relationship between reproductive success of individual plants and number of visits made by the top three flower-visiting species (in terms of both frequency of occurrence at censuses and number of floral visits). Bagged flowers fruited less and with fewer seeds than control flowers. The only observed flower-visiting vertebrate was the Tenerife lizard Gallotia galloti, whose interactions were always legitimate and with around a half of captured individuals carrying pollen grains. The most frequent flower-visiting insect was the honeybee Apis mellifera followed by the solitary bee Lasioglossum arctifrons. The honeybee, however, was only a nectar robber, and the solitary bee was not an effective pollinator, but rather a pollen gatherer. Fruit set by individual plants was positively related only to frequency of visits by the lizard. Thus, the lizard seems to play a key role in the conservation management of L. maculatus.

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The pollination system and stigmatic cuticle ofClianthus puniceus(Fabaceae)

Abstract: To cite this article: P. B. Heenan (1998)

Cited by 8 publications

References 16 publications

Pollen viability and stigma receptivity in Swainsona formosa (G.Don) J.Thompson (Fabaceae), an ornamental legume native to Australia

Pollen viability and stigma receptivity in Swainsona formosa (G.Don) J.Thompson (Fabaceae), an ornamental legume native to Australia

Progress in understanding pollination systems in New Zealand

Flower-visiting lizards as key ecological actors for an endemic and critically endangered plant in the Canary Islands

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