A re-evaluation of the structure of the mango ovule in comparison with those of a few other Anacardiaceae species

Robbertse, P.J.; Teichman, Irmgard von; Rensburg, H. J. van

doi:10.1016/s0254-6299(16)31596-4

Cited by 19 publications

(43 citation statements)

References 6 publications

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“…Even in Buchanania , in which the unusual gynoecium has been described as either completely apocarpous (Marchand, 1869; Baillon, 1874a; Engler, 1876, 1892; Wannan, 2006) or basally syncarpous (Wannan & Quinn, 1991), our results show the presence of a short syncarpous zone. Our findings are in line with Robbertse, von Teichman & van Rensburg (1986), who noted that completely apocarpous gynoecia may not be present in Anacardiaceae. In both families, the gynoecium commonly comprises between five and two carpels.…”

Section: Discussionsupporting

confidence: 93%

“…In the pseudomonomerous gynoecium of most Anacardioideae and some Spondiadoideae, the unequal development of the three carpels (sometimes more in Spondiadoideae) and the various degrees of reduction of the sterile carpels make it sometimes difficult (if not impossible) to use the terminology of Leinfellner (1950), traditionally used to describe a syncarpous gynoecium, as noted by Bachelier & Endress (2007). In Anacardiaceae, there is a correlation between the development of the synascidiate zone and the insertion level of the ovule in the locule (the more developed, the higher) (Robbertse et al. , 1986).…”

Section: Discussionmentioning

confidence: 99%

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Comparative floral morphology and anatomy of Anacardiaceae and Burseraceae (Sapindales), with a special focus on gynoecium structure and evolution

Bachelier

Endress

2009

Botanical Journal of the Linnean Society

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Anacardiaceae and Burseraceae are traditionally distinguished by the number of ovules (1 vs. 2) per locule and the direction of ovule curvature (syntropous vs. antitropous). Recent molecular phylogenetic studies have shown that these families are sister groups in Sapindales after having been separated in different orders for a long time. We present a comparative morphological study of the flower structure in both families. The major clades, usually supported in molecular phylogenetic analyses, are well supported by floral structure. In Anacardiaceae, there is a tendency to gynoecium reduction to a single fertile carpel (particularly in Anacardioideae). The single ovule has a long and unusually differentiated funicle, which connects with the stylar pollen tube transmitting tract in all representatives studied. In Anacardiaceae-Spondiadoideae, there is a tendency to form an extensive synascidiate zone, with a massive remnant of the floral apex in the centre; these features are also present in Beiselia (Burseraceae) and Kirkiaceae (sister to Anacardiaceae plus Burseraceae) and may represent a synapomorphy or apomorphic tendency for the three families. In core Burseraceae, gynoecium structure is much less diverse than in Anacardiaceae and has probably retained more plesiomorphies. Differences in proportions of parts of the ovules in Anacardiaceae and Burseraceae are linked with the different direction of ovule curvature.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Comparative floral morphology and anatomy of Anacardiaceae and Burseraceae (Sapindales), with a special focus on gynoecium structure and evolution

Bachelier

Endress

2009

Botanical Journal of the Linnean Society

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“…(31) Ovule insertion - Robbertse et al (1986) have suggested that the differing positions of funicle insertion on the locule wall may be related to the abortion of carpels alongside the fertile carpel (they cite Mangifera). While this may be true in some genera, it appears not to be the case in Pistacia, where on occasions there are two fertile carpels produced both with basally attached ovules ( fig.…”

Section: Amphipterygium Pistacia)mentioning

confidence: 99%

“…There are suggestions that a single integument has been derived from the bitegmic condition, but there is little agreement on how this may have occurred. Robbertse et al (1986), working on Mangifera, have suggested that the single integument condition may be a neotonic form, but Copeland (1962) indicated that the single integument in Anacardium exhibited features that indicated it was the fusion product of two integuments, and Von Teichman (1990) suggested that in Tapirira there has been reduction of the inner integument. Hence, the single integument state may not be homologous in all taxa.…”

Section: Amphipterygium Pistacia)mentioning

confidence: 99%

Analysis of Generic Relationships in Anacardiaceae

Wannan¹

2006

blum - j plant tax and plant geog

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SUMMARYCladistic analyses were undertaken of Anacardiaceae using non-sequence data (30 genera and 81 characters from morphology, anatomy, palynology and chemotaxonomy), sequence data (26 genera -rbcL) and a combined dataset of 16 genera. All analyses supported a group of genera which can be recognised at the subfamily level: Anacardioideae. Sequence data and combined datasets supported the recognition of a second subfamily: Spondiadioideae Kunth emend. Wannan. Both datasets also suggested that Buchanania lies outside both subfamily groups.

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“…In the cycad ovule ( Fig. 1), the integument is clearly inserted at the top (micropylar) part of the ovule and the female gametophyte lies embedded in a secondary cavity formed by the basal, vascularised (chalazal) part of the ovule, analogous to the pachychalaza found in the ovules of dicotyledonous ovules (Corner 1992; Robbertse et al (1986). The cycad ovule and seed is therefore clearly pachychalazal.…”

Section: Seed Coat Terminologymentioning

confidence: 95%

Origin of the Coleorhiza in Cycad Seedlings and its Structural Homology with That of the Poaceae

2010

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In the literature there is disagreement about the existence of a coleorhiza in cycad embryos. In this paper the terminology of the cycad ovule, seed and embryo is revised. It was confirmed that the cycad ovule and seed are pachychalazal and that the seed coat is exclusively formed by the pachychalaza. The term 'pleurotesta' as a substitute for the so-called 'endotesta' is suggested to describe the inner, membranous part of the seed coat. The anatomy of the cycad embryo was studied in comparison with the grass embryo and it was found that a coleorhiza does exist in cycad embryos and derives from the distal part of the suspensor. It is postulated that the coleorhiza in grasses also derives from the distal part of the suspensor and that the two structures are therefore structurally homologous.

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A re-evaluation of the structure of the mango ovule in comparison with those of a few other Anacardiaceae species

Cited by 19 publications

References 6 publications

Comparative floral morphology and anatomy of Anacardiaceae and Burseraceae (Sapindales), with a special focus on gynoecium structure and evolution

Comparative floral morphology and anatomy of Anacardiaceae and Burseraceae (Sapindales), with a special focus on gynoecium structure and evolution

Analysis of Generic Relationships in Anacardiaceae

Origin of the Coleorhiza in Cycad Seedlings and its Structural Homology with That of the Poaceae

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