MORPHOLOGICAL AND CYTOLOGICAL STUDIES ON <i>FAGOPYRUM ESCULENTUM</i>

Mahony, Kenneth L.

doi:10.1002/j.1537-2197.1935.tb05035.x

Cited by 16 publications

(10 citation statements)

References 24 publications

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“…The early stages of embryo development in Polygonum pensylvanicum were found to be similar to those described for other members of the Polygonaceae by Soueges (1919aSoueges ( , 1919bSoueges ( , 1920aSoueges ( , 1920bSoueges ( , 1924 and Lonay (1922), with the exception of the work by Mahony (1936) In the present study a uniseriate tunica was found to be present in the stem apex of the embryo ten days after anthesis. At this time a plumular leaf is initiated in the outer region of the corpus.…”

Section: Discussionsupporting

confidence: 89%

“…Early stages of embryo development in Pagopyrum esculentum Moench. were described in detail by Mahony (1936). He found that the three-celled embryo develops from the two-celled embryo by a transverse division of the apical cell, whereas Souèges in his investi gation found this transverse division to occur in the basal cell of the two-celled embryo.…”

Section: Review Of Pertinent Literaturementioning

confidence: 98%

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Embryogeny and vegetative developmental anatomy of Polygonum pensylvanicum L.

Neubauer

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Section: Discussionsupporting

confidence: 89%

Section: Review Of Pertinent Literaturementioning

confidence: 98%

Embryogeny and vegetative developmental anatomy of Polygonum pensylvanicum L.

Neubauer

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“…In buckwheat, the two polar nuclei may have fused before anthesis. Mahony (1935) reported that the fused nucleus then migrates to a position near the egg apparatus. In Petunia (Van Went 1970a) Capsella (Schulz and Jensen 1973), Helianthus annuus (Newcomb 1973) and Brodiaea (Berg 1978) the fusion is also completed before fertilization.…”

Section: Functional Embryo Sacmentioning

confidence: 99%

Ultrastructural Changes of the Mature Embryo Sac in Buckwheat (Fagopyrum esculentum) as a Result of High Temperature Exposure.

Guan

Adachi

1994

CYTOLOGIA

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“…Buckwheat is advantageous for this study because it is an hermaphroditic, self‐incompatible plant (Stevens, 1912b; Morris, 1952) that contains one ovule per ovary (Stevens, 1912a; Mahony, 1935; Obendorf et al, 1993), thereby simplifying assessment of abortion. In the greenhouse, flowers are open and turgid for 1 d when they are pollinated, and the cycle from seed to seed is complete in 12 wk (preliminary observations).…”

mentioning

confidence: 99%

“…Buckwheat flowers are incomplete (lacking a corolla), perfect, and heterostylous (Stevens, 1912b; Mahony, 1935; Morris, 1952). Half of the plants have pin‐type flowers with long styles and short filaments, and half of the plants have thrum‐type flowers with short styles and long filaments.…”

mentioning

confidence: 99%

Quantitative Assessment of Some Factors Limiting Seed Set in Buckwheat

Taylor

Obendorf

2001

Crop Science

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estimate of fitness, for example, seed set. Likewise, the theory of reproductive strategies of plants has been in-A healthy buckwheat (Fagopyrum esculentum Moench) plant profluenced by our ability to determine the mechanisms by duces numerous flowers but few seeds. The objective of this study was to investigate mechanisms responsible for the low frequency of which selection may occur. seed set. Newly open and receptive flowers were pollinated at weekly Reduced seed number can be caused by: (i) insuffiintervals from 4 to 12 wk after seeding (WAS) on selected racemes cient pollination, (ii) sexual selection of male and female of greenhouse-grown plants. Flower number, seed set, abortion, and gametophytes, and (iii) resource limitation of the materanatomical observations of egg sacs and proembryos were analyzed. nal plant (Bawa and Webb, 1984). The male component Although flowers formed continuously for 7 wk, the period of maxiof fitness has been assessed in Campsis radicans (Bertin, mum seed set under controlled conditions was brief (1-2 wk). Compe-1982), Calathea ovandensis (Horvitz and Schemske, 1988), tition within the same nutritional unit (raceme) did not account for Cassia fasiculata (Lee and Bazzaz, 1982), Agave mckellow average seed set per raceme. Neither the number of flowers nor veyana (Sutherland and Delph, 1984), and Lithopserfrequency of seed set was decreased when developing seeds were on mum caroliniense (Weller, 1980). In some cases the evithe same raceme. Abortion (≈10%) was not a major factor limiting seed set. Eighty percent of the flowers failed to initiate seeds even dence indicates that excess flowers contribute to male under controlled growing conditions when hand pollinated. Approxi-fitness by acting as pollen donors (Agave), while in mately 20% of megagametophytes appeared to be defective at antheother cases (Cassia, Lithospermum, Calathea, Campsis) sis. The proportion of ovules containing a proembryo at 24 h after it does not. Sutherland (1987) pooled published obserpollination (HAP) paralleled the proportion initiating seeds, indicatvations of 445 species to test hypotheses related to male ing that fertilization is a limiting process. Pollen tube remnants were fitness. He concluded that excess flowers that fail to observed near the micropyle in 65% of the unfertilized ovules at 24 form mature fruits do not contribute to female fitness HAP. Lack of fertilization accounts for most of the reduction in seed(fruit or seed set) because they abort regardless of their set, appears to be caused by failure of the pollen tube to grow into pollination history. They may act as pollen donors, howthe micropyle, and increases with plant age at pollination. Flowers ever, and thus contribute to male fitness. Conditions for that form late in the plant cycle contribute little to seed set and may be ignored in yield management decisions.

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MORPHOLOGICAL AND CYTOLOGICAL STUDIES ON FAGOPYRUM ESCULENTUM

Cited by 16 publications

References 24 publications

Embryogeny and vegetative developmental anatomy of Polygonum pensylvanicum L.

Embryogeny and vegetative developmental anatomy of Polygonum pensylvanicum L.

Ultrastructural Changes of the Mature Embryo Sac in Buckwheat (Fagopyrum esculentum) as a Result of High Temperature Exposure.

Quantitative Assessment of Some Factors Limiting Seed Set in Buckwheat

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