The Gymnosperms

Biswas, Chhaya; Johri, B. M.

doi:10.1007/978-3-662-13164-0

Cited by 67 publications

(50 citation statements)

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“…However, in M. glyptostroboides only the epidermal cell layer undergoes thickening and cell expansion, whereas the other layers within the microsporangial wall disintegrate gradually. This epidermis thickening is similar to that of other conifer, 28 e.g. Pinus, Cedrus, Cupressus and Cephalotaxus.…”

Section: Disclosure Of Potential Conflicts Of Interestsupporting

confidence: 80%

Temporal and spatial characteristics of male cone development inMetasequoia glyptostroboidesHu et Cheng

Jin

Liang

et al. 2012

Plant Signaling & Behavior

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Section: Disclosure Of Potential Conflicts Of Interestsupporting

confidence: 80%

Temporal and spatial characteristics of male cone development inMetasequoia glyptostroboidesHu et Cheng

Jin

Liang

et al. 2012

Plant Signaling & Behavior

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“…These are: C. sempervirens (common or evergreen cypress) native to the eastern Mediterranean region, C. atlantica Gaussen which is endemic to the Atlas Mountains in Morocco, and C. dupreziana A. Camus which is endemic to the Algerian Tassili N'Ajjer desert. Male cones of Cupressus conform to the Cupressaceae type showing microsporophylls in a cyclic disposition (Biswas & Johri, 1997). Cupressus have male reproductive cones with 8 to 20 opposite decussate scales.…”

mentioning

confidence: 92%

Male phenology and pollen production ofCupressus sempervirensin Tetouan (Morocco)

Aboulaich¹,

Bouziane²,

Kadiri³

et al. 2008

Grana

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“…Their diversity was greatest during the Jurassic and subsequently declined during the Cretaceous transition from gymnosperm to angiosperm-dominated floras (Biswas and Johri 1997). Some 200 cycad species in 11 genera persist in Central and South America, Southern Africa, South-East Asia and Australia (Jones 2002).…”

Section: Introductionmentioning

confidence: 99%

Pollination ecology of the Australian cycad Lepidozamia peroffskyana (Zamiaceae)

Hall¹,

Walter²,

Bergstrom³

et al. 2004

Aust. J. Bot.

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Abstract. Experiments carried out to investigate the reproductive ecology of the Australian cycad Lepidozamia peroffskyana (Regal, Bull. Soc. Imp. Nat. Mosc. 1857, 1: 184) revealed that this species is pollinated exclusively by host-specific Tranes weevils (Pascoe 1875). The weevils carry out their life cycle within the tissues of the male cones but also visit the female cones in large numbers. Female cones from which insects (but not wind) were excluded had a pollination rate that was essentially zero. In contrast, female cones from which wind (but not insects) were excluded had a pollination rate comparable with naturally pollinated cones. Assessment of Tranes weevil pollen load indicated that they are effective pollen-carriers. No other potential insect pollinators were observed on cones of L. peroffskyana. Sampling of airborne loads of cycad pollen indicated that wind-dispersed grains were not consistently recorded beyond a 2-m radius surrounding pollen-shedding male cones. The airborne load of cycad pollen in the vicinity of pollination-receptive female cones was minimal, and the spatial distribution of the coning population indicated that receptive female cones did not usually occur close enough to pollen-shedding male cones for airborne transfer of pollen to explain observed natural rates of seed set. These multiple lines of evidence suggest that wind-once considered the only pollination vector for cycads and other gymnosperms-plays only a minimal role in the pollination of L. peroffskyana, if any at all. The global diversity of insects associated with cycads suggests that some lineages of pollinating beetles may have been associated with cycad cones since Mesozoic times.

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The Gymnosperms

Cited by 67 publications

References 0 publications

Temporal and spatial characteristics of male cone development inMetasequoia glyptostroboidesHu et Cheng

Temporal and spatial characteristics of male cone development inMetasequoia glyptostroboidesHu et Cheng

Male phenology and pollen production ofCupressus sempervirensin Tetouan (Morocco)

Pollination ecology of the Australian cycad Lepidozamia peroffskyana (Zamiaceae)

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