Trigonobalanus, a New Genus of Fagaceae, with Notes on the Classification of the Family

Forman, L. L.

doi:10.2307/4113784

Cited by 65 publications

(53 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The longer branch leading to each individual indicates that the individual is genetically differentiated from each other. Although it has been suggested that there is vegetative reproduction of T. verticillata, in which epicormic (coppice) shoots are produced at the base when the main trunk died or is injured (Forman, 1964;Corner, 1990), no evidence for a clonal state was detected in this study. In our field observation, many seedling could be found, suggesting possible sexual reproduction of this species.…”

Section: Discussioncontrasting

confidence: 79%

“…Trigonobalanus is the most recently described genus of Fagaceae, which was originally considered to contain two species, T. verticillata from Malaysia and Indonesia, and T. doichangensis from Thailand and South China (Forman, 1964). Later, a third species, T. excelsa , was described from Colombia (Lozano et al, 1979).…”

Section: Introductionmentioning

confidence: 99%

“…Although these species were originally placed in a single genus, Trigonobalanus , one or more unique morphological features suggest that the three species may have diverged in ancient times and they are currently treated as three monotypic genera, Trigonobalanus verticillata , Formanodendoron doichangensis , and Colombobalanus excelsa . The collection of Trigonobalanus verticillata and establishing as a new genus has been one of the great botanical topics of the last century because the presence of some ambiguous characteristics suggests this genus to be primitive in the Fagaceae (Forman, 1964;Corner, 1990). For example, the floral apparatus indicates affinities to Quercus , and the wood structure indicates affinity to Quercus and Lithocarpus , while fruit and seedling development resembles that seen in Fagus (Forman, 1990).…”

Section: Introductionmentioning

confidence: 99%

“…Trigonobalanus verticillata has a restricted distribution that is known in the seven localities in Peninsular Malaysia, Borneo, Sumatra, and Celebes (Forman, 1964;Forman and Cutler, 1967;Nixon and Crepet, 1989;Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Genetic variation of Trigonobalanus verticillata, a primitive species of Fagaceae, in Malaysia revealed by chloroplast sequences and AFLP markers.

Kamiya

Harada

Clyde³

et al. 2002

Genes Genet. Syst.

View full text Add to dashboard Cite

The genetic variation of Trigonobalanus verticillata , the most recently described genus of Fagaceae, was studied using chloroplast DNA sequences and AFLP fingerprinting. This species has a restricted distribution that is known to include seven localities in tropical lower montane forests in Malaysia and Indonesia. A total of 75 individuals were collected from Bario, Kinabalu, and Fraser's Hill in Malaysia. The sequences of rbc L , mat K, and three non-coding regions ( atp B -rbc L spacer, trn L intron, and trn L -trn F spacer) were determined for 19 individuals from these populations. We found a total of 30 nucleotide substitutions and four length variations, which allowed identification of three haplotypes characterizing each population. No substitutions were detected within populations, while the tandem repeats in the trn L -trn F spacer had a variable repeat number of a 20-bp motif only in Kinabalu. The differentiation of the populations inferred from the cp DNA molecular clock calibrated with paleontological data was estimated to be 8.3 MYA between Bario and Kinabalu, and 16.7 MYA between Fraser's Hill and the other populations. In AFLP analysis, four selective primer pairs yielded a total of 431 loci, of which 340 (78.9%) were polymorphic. The results showed relatively high gene diversity ( H S = 0.153 and H T = 0.198) and nucleotide diversity ( π S = 0.0132 and π T = 0.0168) both within and among the populations. Although the cp DNA data suggest that little or no gene flow occurred between the populations via seeds, the fixation index estimated from AFLP data ( F ST = 0.153 and N ST = 0.214) implies that some gene flow occurs between populations, possibly through pollen transfer.

show abstract

Section: Discussioncontrasting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Genetic variation of Trigonobalanus verticillata, a primitive species of Fagaceae, in Malaysia revealed by chloroplast sequences and AFLP markers.

Kamiya

Harada

Clyde³

et al. 2002

Genes Genet. Syst.

View full text Add to dashboard Cite

show abstract

“…Ohsawa (1982a) Britanica, 1972;Nakamura et al, 1994).ln general East Jawa has long dry season and the West short. According to a monograph by van Steenis et al (1972) (Forman, 1964(Forman, & 1966 The northernmost distribution of the laurel-leaved forest was studied by Hattori & Nakanishi (1985). The forests go northwards to Oshima Island, Iwate Prefecture (39'15'N) on the Pacific coast and to lwasaki Village, Aomori Prefecture (40'34'N) on the Japan Sea coast (Ishikawa, 1972).The laurel-leaved forests are found only on the beach area and islets in the northern limit of their distibution.…”

Section: Chinamentioning

confidence: 99%

Distribution of Lucidophyll Oak-Laurel Forest Formation in Asia and Other Areas.

日出夫¹

1995

Tropics

View full text Add to dashboard Cite

show abstract

Synchrotron X‐ray imaging of a dichasium cupule of Castanopsis from Eocene Baltic amber

Sadowski

Hammel

Denk

2018

American J of Botany

View full text Add to dashboard Cite

Premise of the Study The Eocene Baltic amber deposit represents the largest accumulation of fossil resin worldwide, and hundreds of thousands of entrapped arthropods have been recovered. Although Baltic amber preserves delicate plant structures in high fidelity, angiosperms of the “Baltic amber forest” remain poorly studied. We describe a pistillate partial inflorescence of Castanopsis (Fagaceae), expanding the knowledge of Fagaceae diversity from Baltic amber. Methods The amber specimen was investigated using light microscopy and synchrotron‐radiation‐based X‐ray micro‐computed tomography (SRμCT). Key Results The partial inflorescence is a cymule, consisting of an involucre of scales that surround all four pistillate flowers, indicating a dichasium cupule. Subtending bracts are basally covered with peltate trichomes. Flowers possess an urecolate perianth of six nearly free lobes, 12 staminodia hidden by the perianth, and a tri‐locular ovary that is convex‐triangular in cross section. The exceptional three‐dimensional preservation suggests that the fossil belongs to the extant East Asian genus Castanopsis. The amber inclusion represents the first record of Castanopsis from Baltic amber and the first pistillate inflorescence of Fagaceae from Eurasia. Conclusions The partial female inflorescence reported here provides an important addition to acorns of Castanopsis described from middle Eocene strata of Europe. Furthermore, the intercontinental distribution of Castanopsis in the Eocene is confirmed. The amber fossil also broadens the picture of the Baltic amber source area, indicating oligotrophic, sandy, bog‐like habitats. Finally, this study underscores the great benefit of SRμCT as a powerful tool to investigate plant inclusions from amber in a nondestructive way.

show abstract

Trigonobalanus, a New Genus of Fagaceae, with Notes on the Classification of the Family

Cited by 65 publications

References 1 publication

Genetic variation of Trigonobalanus verticillata, a primitive species of Fagaceae, in Malaysia revealed by chloroplast sequences and AFLP markers.

Genetic variation of Trigonobalanus verticillata, a primitive species of Fagaceae, in Malaysia revealed by chloroplast sequences and AFLP markers.

Distribution of Lucidophyll Oak-Laurel Forest Formation in Asia and Other Areas.

Synchrotron X‐ray imaging of a dichasium cupule of Castanopsis from Eocene Baltic amber

Contact Info

Product

Resources

About