Overlapping Organ Initiation and Common Primordia in Flowers of Pisum Sativum (Leguminosae: Papilionoideae)

Tucker, Shirley C.

doi:10.1002/j.1537-2197.1989.tb11366.x

Cited by 86 publications

(88 citation statements)

References 27 publications

(25 reference statements)

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“…The Cadia/Calpurnia clade is sister to Sophora, a genus with papilionoid flowers (Tucker, 1994). However, in several Sophora species and other zygomorphic papilionoids (Tucker, 1984(Tucker, , 1985(Tucker, , 1987(Tucker, , 1989(Tucker, , 1993(Tucker, , 1994Tucker and Stirton, 1991) flowers appear radially symmetrical at midstage. Zygomorphy is expressed late in ontogeny in all of these taxa.…”

Section: Discussionmentioning

confidence: 99%

Floral ontogeny in Sophoreae(Leguminosae: Papilionoideae). III. Radial symmetry and random petal aestivation in Cadia Purpurea

Tucker

2002

American J of Botany

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Floral organogeny and development are described in Cadia purpurea, a legume with radial symmetry, unstable petal aestivation, and free organs, all unusual features among papilionoids. Flowers are usually solitary or, rarely, in few-flowered racemes. No bracteoles are formed. The order of organ initiation is unidirectional in each whorl, and the carpel initiates directly after petal initiation.The petal primordia remain small until all other floral organs have initiated, enlarged, and differentiated. Petal aestivation is variable, unlike the great majority of papilionoid flowers. Petal margins of Cadia grow straight outward rather than some petal margins curving inward inside the adjacent petal as is the case in other papilionoids. When adjacent growing petal margins of Cadia meet, chance determines which petal becomes positioned inside the other. Hence, the pattern of petal aestivation is random.Key words: aestivation; Cadia; Fabaceae; floral development; flower; Leguminosae; Papilionoideae; radial symmetry; Sophoreae.Cadia belongs to papilionoid tribe Sophoreae, long considered one of the most basal but heterogeneous tribes of papilionoid legumes (Polhill, 1981(Polhill, , 1994. The tribe has recently been shown to be nonmonophyletic (Herendeen, 1995;Doyle et al., 2000;Ireland, Pennington, and Preston, 2000) and is currently in the process of dismemberment, with certain woody taxa of sophoroids appearing to be more closely related to some elements of tribes Swartzieae, Dalbergieae, and others (Ireland, Pennington, and Preston, 2000;Pennington et al., 2000Pennington et al., , 2001. Recent molecular-based analyses (Doyle et al., 2000;Pennington et al., 2000Pennington et al., , 2001 place Cadia as sister to Calpurnia (tribe Podalyrieae) but embedded within a clade containing other sophoroid taxa. Cadia, a genus of small shrubs from Arabia, Madagascar, and eastern Africa, has long been of interest because of its radial floral symmetry and atypically unstable petal aestivation (van der Maesen, 1970;Tucker, 1984Tucker, , 1987, in contrast to the prevailingly uniform, descending cochleate aestivation of nearly all other Papilionoideae.The tribe Sophoreae sensu Polhill (1981Polhill ( , 1994 includes the putatively least specialized and most plesiomorphic taxa of the large subfamily Papilionoideae of legumes. As originally conceived by Bentham (1841) the tribe was considered transitional between papilionoids and the subfamily Caesalpinioideae. The emphasis on the heterogeneity in Sophoreae (Polhill, 1981) prompted examination of the pollen structure (Ferguson, Schrire, and Shepperson, 1994), endothecial characters (Manning and Stirton, 1994), and wood (Gasson, 1994). Because of the recent surge in interest in taxa of Sophoreae sensu lato (s.l.), the floral ontogeny of Cadia purpurea Ait. is presented, together with updated comments on its putatively plesiomorphic character states. MATERIALS AND METHODSYoung inflorescences and flower buds of all sizes were collected and preserved in formalin-acetic acid-70% ethyl alcohol ...

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Section: Discussionmentioning

confidence: 99%

Floral ontogeny in Sophoreae(Leguminosae: Papilionoideae). III. Radial symmetry and random petal aestivation in Cadia Purpurea

Tucker

2002

American J of Botany

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“…C. fasciulata produces floral meristems from the developing I2, accompanied by the outgrowth of other organs including bracts, bracteoles, additional axillary flowers, and vegetative shoots. In contrast, papilionoids, specifically the well-studied garden pea (Pisum sativum), produce flowers and suppress the outgrowth of additional organs (Tucker, 1989;Singer et al, 1990;Fig. 4).…”

Section: Floweringmentioning

confidence: 99%

“…2). Papilionoid flowers have strong bilateral symmetry, a derived condition within the angiosperms (Tucker, 1989). Comparisons of the floral transcriptomes of Chamaecrista and papilionoid legumes may offer clues to the origins of bilateral symmetry within the legumes.…”

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confidence: 99%

Venturing Beyond Beans and Peas: What Can We Learn from Chamaecrista?

et al. 2009

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Expanding legume research beyond the model members of the subfamily Papilionoideae (papilionoids) is necessary if we wish to capture more of the diversity of the enormous, economically important legume family. Chamaecrista fasciculata is emerging as a nonpapilionoid model, belonging to the paraphyletic subfamily Caesalpinioideae within the mimosoid clade. Mimosoids diverged from the common ancestor of soybean (Glycine max), Medicago truncatula, and Lotus japonicus nearly 60 million years ago-nearly contemporaneously with the origin of legumes. There is growing interest within the legume community in C. fasciculata as a complementary legume model for a number of reasons, including phylogenetic position, nodulation within a clade of limited nodulating species, nonpapilionoid floral morphology, herbaceous growth habit, and tractability in laboratory and field settings. Whole-transcriptome sequencing (WTS) of C. fasciculata shoots, roots, and nodules, along with gene expression and single nucleotide polymorphism (SNP) profiling, provides community resources to address fundamental questions about legume evolution. A range of ecotypes, development of functional genomics tools, and an integration of research and undergraduate education leverage these genomic resources.

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“…The whole-genome sequencing project has been carried out [12], and several L. japonicus Chr. TM0123 TM0050 TM0193 TM0117 TM0001 TM0122 TM0134 TM0065 TM0225 TM0124 TM0020 TM0002 TM0436 TM0190 TM0155 TM0142 TM0049 TM0203 TM0127 TM0288 TM0182 TM0247 TM0030 TM0046 TM0218 TM0095 TM0048 TM0062 TM0072 TM0146 TM0014 TM0057 TM0140 TM0066 TM0336 TM0314 * [17][18][19]. Our previous work has demonstrated that L. japonicus is an excellent system to dissect the components in the pathway to control floral development [20,21].…”

Section: Introductionmentioning

confidence: 99%

Wrinkled petals and stamens 1, is required for the morphogenesis of petals and stamens in Lotus japonicus

et al. 2006

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Although much progress has been made in understanding how floral organ identity is determined during the floral development, less is known about how floral organ is elaborated in the late floral developmental stages. Here we describe a novel floral mutant, wrinkled petals and stamens1 (wps1), which shows defects in the development of petals and stamens. Genetic analysis indicates that wps1 mutant is corresponding to a single recessive locus at the long arm of chromosome 3. The early development of floral organs in wps1 mutant is similar to that in wild type, and the malfunction of the mutant commences in late developmental stages, displaying a defect on the appearance of petals and stamens. In the mature flower, petals and stamen filaments in the mutant are wrinkled or folded, and the cellular morphology under L1 layer of petals and stamen filaments is abnormal. It is found that the expression patterns of floral organ identity genes are not affected in wps1 mutants compared with that of wild type, consistent with the unaltered development of all floral organs. Furthermore, the identities of epidermal cells in different type of petals are maintained. The histological analysis shows that in wps1 flowers all petals are irregularly folded, and there are knotted structures in the petals, while the shape and arrangement of inner cells are malformed and unorganized. Based on these results, we propose that Wps1 acts downstream to the class B floral organ identity genes, and functions to modulate the cellular differentiation during the late flower developmental stages.

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Overlapping Organ Initiation and Common Primordia in Flowers of Pisum Sativum (Leguminosae: Papilionoideae)

Cited by 86 publications

References 27 publications

Floral ontogeny in Sophoreae(Leguminosae: Papilionoideae). III. Radial symmetry and random petal aestivation in Cadia Purpurea

Floral ontogeny in Sophoreae(Leguminosae: Papilionoideae). III. Radial symmetry and random petal aestivation in Cadia Purpurea

Venturing Beyond Beans and Peas: What Can We Learn from Chamaecrista?

Wrinkled petals and stamens 1, is required for the morphogenesis of petals and stamens in Lotus japonicus

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