Fossils and Phenology in the Evolution of Ginkgo biloba

Rothwell, Gar W.; Holt, Ben F.

doi:10.1007/978-4-431-68416-9_17

Cited by 22 publications

(31 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The author noted the presence of a homogeneous nexine and a slightly thicker, faintly structured sexine. Rothwell and Holt (1997) published a SEM micrograph of an apparently damaged ellipsoidal pollen grain from the interior of a dehisced pollen sac from a fossil pollen cone of Ginkgo from the Maastrichtian of Canada. Monosulcate monads and immature tetrads were reported from microsporangia of G. liaoningensis Liu, Li et Wang, 2006(Liu et al, 2006.…”

Section: Discussionmentioning

confidence: 99%

“…The exine ultrastructure has been studied in the pollen grains of the Jurassic cycads Cycandra profusa Krassilov, Delle et Vladimirova, 1996(Tekleva et al, 2007 and Androstrobus prisma Thomas et Harris, 1960(Zavialova & Van Konijnenburg-van Cittert, 2008 and the bennettitalean Williamsoniella coronata Thomas, 1915(Zavialova et al, 2009). As to ginkgoaleans, although several reproductive structures and in situ pollen grains have been reported (Van Konijnenburg-van Cittert, 1971;Balme, 1995;Rothwell & Holt, 1997), we have failed to extract pollen from their pollen organs. We continue searching for pollen organs of the studied groups with the aim of subsequent extraction of in situ pollen; however, other sources of information about the pollen morphology are also being considered.…”

mentioning

confidence: 93%

See 1 more Smart Citation

The ultrastructure of fossil dispersed monosulcate pollen from the Early Cretaceous of Transbaikalia, Russia

Zavialova

Маркевич

Бугдаева

et al. 2011

Grana

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 93%

The ultrastructure of fossil dispersed monosulcate pollen from the Early Cretaceous of Transbaikalia, Russia

Zavialova

Маркевич

Бугдаева

et al. 2011

Grana

View full text Add to dashboard Cite

“…This might be due to the uniqueness of the Ginkgo biloba itself, which stands alone in the Ginkgophyta division in taxonomy without any closely related living relatives (Rothwell and Holt 1997). The Localizome software predicted the presence of signal peptide in the deduced amino acid sequence of VMPCMEK.…”

Section: Relative Expression Analysis Of Vmpcmek and Vmpcyp450 Transcmentioning

confidence: 99%

Screening, isolation, and molecular characterization of putative fragrance-related transcripts from Vanda Mimi Palmer

et al. 2011

View full text Add to dashboard Cite

The aims of this study were to isolate and characterize putative fragrance-related cDNAs from the floral cDNA library of Vanda Mimi Palmer, an orchid hybrid that has won several international awards for its sweet fragrance. A total of 1,000,000 pfu were screened by hybridizing cDNA library plaques with fully open flower cDNA probe of Vanda Mimi Palmer representing all mRNAs expressed during daytime. The clones that gave positive signals were in vivo excised and PCR-amplified inserts were subjected to reverse-Northern analysis by hybridizing with cDNA probes of fully open flower of Vanda Mimi Palmer (fragrant orchid) and its bud or fully open flower of Vanda Tan Chay Yan (non-fragrant orchid) separately. The clones up-regulated in fully open flower stage of Vanda Mimi Palmer compared to its bud stage or fully open flower of Vanda Tan Chay Yan were sequenced. Sequence analyses showed the presence of eight putative fragrance-related cDNAs of which two were putative Vanda Mimi Palmer 4-(cytidine 5 0 -diphospho)-2-Cmethyl-D-erythritol kinase (VMPCMEK) and Vanda MimiPalmer cytochrome P450 protein (VMPCyP450). These two transcripts were selected for full-length cDNA isolation and expression analysis by real-time RT-PCR. The VMPCMEK transcript encodes a polypeptide of 400 amino acid residues, while the VMPCyP450 encodes 538 amino acid residues. Relative expression analysis of VMPCMEK and VMPCyP450 transcripts by real-time RT-PCR showed up-regulated expressions in floral tissues compared to vegetative tissues, and both were found to be developmentally regulated.

show abstract

“…Maidenhair tree is a so called "living fossil" (Beerling et al, 1998;Beerling, 1999), representing one of the most ancient seed plants. It attained a circumpolar distribution in the Northern hemisphere and extended into several regions of the Southern hemisphere between the late Mesozoic and early Tertiary, but with a rapid decline from the Miocene to the Quaternary (Rothwell and Holt, 1997). It is interesting that over much of the Mesozoic and Tertiary, the partial pressure of atmospheric CO 2 is predicted by geochemical models to have been 2 to 5 times the pre-industrial value (30 Pa; Berner, 1997).…”

mentioning

confidence: 99%

Long-Term Growth of Ginkgo with CO2 Enrichment Increases Leaf Ice Nucleation Temperatures and Limits Recovery of the Photosynthetic System from Freezing

Terry¹,

Quick

Beerling

2000

Plant Physiology

View full text Add to dashboard Cite

The importance of subzero temperature interactions with elevated CO 2 on plant carbon metabolism has received rather little attention, despite their likely role in influencing future vegetation productivity and dynamics. Here we focused on the critical issues of CO 2 -enrichment effects on leaf-freezing temperatures, subsequent membrane damage, and recovery of the photosynthetic system. We show that growth in elevated CO 2 (70 Pa) results in a substantial and significant (P Ͻ 0.01) increase (up to 4°C) in the ice nucleation temperature of leaves of Maidenhair tree (Ginkgo biloba), which was observed consistently throughout the 1999 growing season relative to their ambient CO 2 (35 Pa) counterparts. We suggest that increased sensitivity of leaves to ice damage after growth in elevated CO 2 provides an explanation for increased photoinhibition observed in the field early and late in the growing season when low nighttime temperatures are experienced. This new mechanism is proposed in addition to the earlier postulated explanation for this phenomenon involving a reduction in the rate of triose-P utilization owing to a decrease in the rate of carbohydrate export from the leaf.

show abstract

Fossils and Phenology in the Evolution of Ginkgo biloba

Cited by 22 publications

References 14 publications

The ultrastructure of fossil dispersed monosulcate pollen from the Early Cretaceous of Transbaikalia, Russia

The ultrastructure of fossil dispersed monosulcate pollen from the Early Cretaceous of Transbaikalia, Russia

Screening, isolation, and molecular characterization of putative fragrance-related transcripts from Vanda Mimi Palmer

Long-Term Growth of Ginkgo with CO2 Enrichment Increases Leaf Ice Nucleation Temperatures and Limits Recovery of the Photosynthetic System from Freezing

Contact Info

Product

Resources

About