The embryology of Xanthoceras and its phylogenetic implications

Zhou, Quan; Liu, G. S.

doi:10.1007/s00606-011-0558-4

Cited by 31 publications

(27 citation statements)

References 30 publications

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“…The present study revealed that embryological characters of Delavaya toxocarpa share a number of features with the other members of Sapindaceae s.l. previously described (Nair & Joseph, ; List & Steward, ; Mathur & Gulati, ; Ye et al, ; Cao et al, ; Zhou & Liu, ), particularly thyrse, nectar disk, tetrasporangiate anthers, fibrous endothecium, glandular tapetum, simultaneous cytokinesis in the microsporocytes, tetrahedral microspore tetrads, crassinucellate and bitegmic ovule, Polygonum type of megagametophytes, curved embryo sac in mature seed, axile placentation, and no endosperm in mature seed (Table ). These similarities indicate that the species and genera of Sapindaceae s.l.…”

Section: Discussionmentioning

confidence: 96%

“…Embryological information is complementary to molecular phylogenetics and is particularly useful in resolving systematic relationships at the genus and subfamily levels (Tobe, 1989;Johri et al, 1992;Berg, 2009;Zhou & Liu, 2012). To date, the chemical constituents (Qin et al, 2000(Qin et al, , 2001, pollen morphology (Wang & Qian, 1956;Muller & Leenhouts, 1976), chromosome number (Lombello & Forni-Martins, 1998), and floral organogenesis (Cao & Xia, 2009) of D. toxocarpa have been studied, but embryological information is lacking.…”

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confidence: 99%

“…This study investigated the sporogenesis and gametogenesis of D. toxocarpa for the first time and compared the embryological characters with those previously described taxa of Sapindaceae s.s., Aceraceae, and Hippocastanaceae (Nair & Joseph, 1960;List & Steward, 1965;Haskell & Postlethwait, 1971;Gulati & Mathur, 1977;Mathur & Gulati, 1980;Ye et al, 1992;Jacobs & Lersten, 1994;Weckerle & Rutishauser, 2005;Cao et al, 2008;Zhou & Liu, 2012). Based on a comparative analysis of the embryological data, we intend to discuss the systematic position of D. toxocarpa.…”

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confidence: 99%

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Sporogenesis and gametogenesis of Delavaya toxocarpa (Sapindaceae) and their systematic implications

Cao

Liu

et al. 2014

J of Sytematics Evolution

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In order to investigate the embryological characteristics of Delavaya toxocarpa Franch. and provide a basis for further understanding the phylogeny within Sapindaceae s.l., we studied the sporogenesis and gametogenesis of D. toxocarpa using the conventional paraffin section method. The results were as follows: anthers are tetrasporangium; tapetum is typically secretory type; cytokinesis in the microsporecyte meiosis is of the simultaneous type and microspore tetrads are tetrahedral; mature pollen contains two cells; the ovary is bilocular with two ovules per locule; placentation is axial; the ovule is amphitropous, bitegmic, and crassinucellate; the chalazal megaspore in a linear tetrad becomes functional; and the development of megaspore is of the polygonum type. Most similarities shared by the species observed suggest that the species and genera of Sapindaceae s.l. have phylogenetic consistency. The distinctive trait, lacking hypostase, indicates Delavaya (and Handeliodendron) might be more primitive than other genera in Sapindaceae. Moreover, some characters, such as opposite palmate compound leaf, apical thyrse, rounded seed without wing, 2 hemitropous ovules per locule, and lacking aril, indicate the close relationship between Delavaya, Aceraceae, and Hippocastanaceae. The preliminary data about the embryological and morphological characteristics in Delavaya might justify the basic systematic position of this genus in the family Sapindaceae s.s.

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Section: Discussionmentioning

confidence: 96%

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confidence: 99%

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confidence: 99%

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Sporogenesis and gametogenesis of Delavaya toxocarpa (Sapindaceae) and their systematic implications

Cao

Liu

et al. 2014

J of Sytematics Evolution

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“…Fruit of yellowhorn form capsules, those capsules disclose when ripe (July–August), the capsule shells become hard and woody. These fruits contain on average 15–25 seeds (with hard seed coats) (Zhou & Liu, ), and mean single seed weight is around 0.87 g (Wang, Huang et al, ; Wang, Yang et al, ). As in most plant species, relatively heavy seed is dispersed within short distance (dozen meters) (Willson, ).…”

Section: Discussionmentioning

confidence: 99%

Conservation of genetic diversity hotspots of the high‐valued relic yellowhorn (Xanthoceras sorbifolium) considering climate change predictions

Zhu

Wang

Guan

et al. 2019

Ecology and Evolution

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Genetic structure and major climate factors may contribute to the distribution of genetic diversity of a highly valued oil tree species Xanthoceras sorbifolium (yellowhorn). Long‐term over utilization along with climate change is affecting the viability of yellowhorn wild populations. To preserve the species known and unknown valuable gene pools, the identification of genetic diversity “hotspots” is a prerequisite for their consideration as in situ conservation high priority. Chloroplast DNA (cpDNA) diversity was high among 38 natural populations (Hd = 0.717, K = 4.616, Tajmas’ D = −0.22) and characterized by high genetic divergence (FST = 0.765) and relatively low gene flow (Nm = 0.03), indicating populations isolation reflecting the species’ habitat fragmentation and inbreeding depression. Six out of the studied 38 populations are defined as genetic diversity “hotspots.” The number and geographic direction of cpDNA mutation steps supported the species southwest to northeast migration history. Climatic factors such as extreme minimum temperature over 30 years indicated that the identified genetic “hotspots” are expected to experience 5°C temperature increase in next following 50 years. The results identified vulnerable genetic diversity “hotspots” and provided fundamental information for the species’ future conservation and breeding activities under the anticipated climate change. More specifically, the role of breeding as a component of a gene resource management strategy aimed at fulfilling both utilization and conservation goals.

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“…In this species, plants produce a large number of male and a limited number hermaphrodite flowers (Zhou and Fu 2010). As anthers of the hermaphrodite flowers do not dehisce at anthesis, thus, they are functionally female (Zhou and Liu 2012). Seeds of this species contain copious amount of unsaturated fatty acids that have dietary, medicinal, and industrial uses (Zhang et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Fruit shape and reproductive self and cross compatibility for the performance of fruit set in an andromonoecious species: Xanthoceras sorbifolium Bunge

Wang

Huang

Wang

et al. 2017

Tree Genetics & Genomes

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A replicated 6 × 6 complete diallel mating among six fruit shape types of Xanthoceras sorbifolium (yellowhorn), an andromonoecious plant known for its exceedingly low fruit and seed set, was conducted to investigate the species mating system. This mating design was implemented to investigate the relationship between fruit shape type and fruit yield, finding the most productive fruit shape-type matings, and explore maternal and paternal plants spatial arrangements for yield enhancement. The study confirmed the maternal inheritance of fruit shape type, open-pollination often associated with low fruit production, the presence of high inbreeding depression, and differential yield among fruit shape-type matings and directions and identified specific matings between fruit shape types with increased yield potential for the species' commercial production. A high fruit yield planting spatial arrangement of parents is proposed and its pro et contra under openpollinated production mode were discussed.

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The embryology of Xanthoceras and its phylogenetic implications

Cited by 31 publications

References 30 publications

Sporogenesis and gametogenesis of Delavaya toxocarpa (Sapindaceae) and their systematic implications

Sporogenesis and gametogenesis of Delavaya toxocarpa (Sapindaceae) and their systematic implications

Conservation of genetic diversity hotspots of the high‐valued relic yellowhorn (Xanthoceras sorbifolium) considering climate change predictions

Fruit shape and reproductive self and cross compatibility for the performance of fruit set in an andromonoecious species: Xanthoceras sorbifolium Bunge

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