Seedlings of Nymphaeaceae

Haines, R. Wheeler; Lye, Kåre Arnstein

doi:10.1111/j.1095-8339.1975.tb01649.x

Cited by 41 publications

(27 citation statements)

References 15 publications

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“…Von Guttenberg et Miiller-Schroder ( 1958) notent que le pole radiculaire du Nuphar, et en particulier Ia partie dermatogene, se developpe comme chez les Monocotyledones (type liorhize) et que Ia racine primaire ne germe pas. Ce dernier point est en contradiction avec les etudes de germination (Haines & Lye, 1975 ;Tillich, 1990). Plus generalement Clowes (1994) Cabomba en plus des genres cites ci-dessus, est monophyletique avec une confirmation a 100% par Ia methode de reechantillonnage (bootstrap analysis).…”

Section: Analyse Des Resultatsunclassified

Origine et étapes de la monocotylie chez les Monocotylédones. III—L'embryon desNymphaeaceae: une forme intermédiaire entre Dicotylédones et Monocotylédones

Juguet

2000

Acta Botanica Gallica

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Section: Analyse Des Resultatsunclassified

Origine et étapes de la monocotylie chez les Monocotylédones. III—L'embryon desNymphaeaceae: une forme intermédiaire entre Dicotylédones et Monocotylédones

Juguet

2000

Acta Botanica Gallica

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“…However, Wheeler Haines (1975) identified this structure in other Nymphaeaceae species as a mesocotyl. The mesocotyl is the first internode connection between the coleoptile and the plumule.…”

Section: Discussionmentioning

confidence: 99%

“…The mesocotyl is the first internode connection between the coleoptile and the plumule. This characteristic is common in Poaceae and Cyperaceae species, and although it has evolved independently in each group, this feature would be important to characterize these families as monocots (Wheeler Haines, 1975).…”

Section: Discussionmentioning

confidence: 99%

<b>Fruit and seed biometry and germination of <i>Victoria amazonica</i> (Poepp.) J.C. Sowerby (Nymphaeaceae) from the Pantanal floodplain

Tozin

Corrêa-Da-Costa

Scremin-Dias

2016

Acta Sci. Biol. Sci.

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ABSTRACT. Numerous plant species are easily established in the wide flood plains of the Pantanal wetlands due to the environmental heterogeneity. The aquatic macrophytes excel in permanently flooded areas, particularly Nymphaeaceae species. Victoria amazonica, popularly known as the vitória-régia, is hallmarked for its beauty. However, the biology and conditions necessary for the seed germination of this flowering plant remain unknown. In the present study, the fruit and seed morphology and biometry were described and the seed germination was evaluated under different abiotic conditions. To this end, mature fruits of V. amazonica were collected from the bays near Paraguay River in the south Pantanal floodplain. The fruits and seeds were described and measured using digital caliper. Intact and mechanically scarified seeds were germinated under different temperature, light and substratum conditions, and the initial development was described. The fruits measured 67.5 x 119.7 mm in size and contained 100-700 seeds. The average seed measured 10.6 mm in length and 9.8 mm in width. The highest germination occurred at 25 o C, independent of the light condition. The seeds were considered neutral photoblastic. The seedlings showed heterophylly, and the main root was degenerated, forming adventitious roots. Morphological differences were observed in seedlings developed under different light conditions. Keywords: aquatic macrophyte, hydrophytes, water lilies, vitória-régia.Biometria do fruto e da semente e germinação de Victoria amazonica (Poepp.) J.C. Sowerby (Nymphaeaceae) do Pantanal RESUMO. O Pantanal, ampla planície inundável, facilita o estabelecimento de inúmeras espécies vegetais por sua heterogeneidade ambiental. As macrófitas aquáticas se destacam em áreas permanentemente alagadas, com destaque para a família Nymphaeaceae. A espécie Victoria amazonica, conhecida popularmente como vitória-régia, é marcada por sua beleza. Entretanto, sua biologia e as condições necessárias à germinação de suas sementes permanecem desconhecidas. Nesse estudo foram descritas a biometria e a morfologia do fruto e da semente, e avaliada a germinação em diferentes condições abióticas. Para isso, frutos de V. amazonica foram coletados em baias próximas ao rio Paraguai no Pantanal sul. Os frutos e as sementes foram descritos e mensurados usando paquímetro digital. Sementes íntegras e escarificadas mecanicamente foram submetidas a testes de germinação em diferentes condições de temperatura, luz e substrato, e o desenvolvimento inicial das plântulas foi descrito. Os frutos mediram 67,5 x 119,7 mm, e portavam 100-700 sementes. As sementes mediram 10,6 mm de comprimento e 9,8 mm de largura em média. A maior porcentagem de germinação ocorreu a 25 o C independente da condição de luz. As sementes foram consideradas fotoblásticas neutras, e as plântulas possuem heterofilia, degeneração da raiz principal e formação de raízes adventícias. Foram observadas diferenças morfológicas nas plântulas desenvolvidas na presença e na ausência de luz.Palavras-c...

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“…Apart from the medullary stem bundles and unisulcate pollen grains (at least in Brasenia, Cabomba and Nuphar) , the order exhibits one most unexpected feature, not, otherwise known outside typical monocotyledons, i.e., as HAINES & LYE (1975) have pointed out, an embryo possessing not only a single cotyledon but forming a coleoptile. Finally, the helobial formation of endosperm in Cabomba is worth mentioning.…”

Section: Hhubermentioning

confidence: 94%

The Treatment of the Monocotyledons in an Evolutionary System of Classification

Huber

1977

Flowering Plants

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The more characters to distinguish monocotyledons and dicotyledons that are taken into consideration, the more numerous become the families which exhibit both mono-and dicotyledonous characters. In particular, monocotyle~ons and ranalean dicotyledons appear intimately related and the gaps between them do not allow a distinction into classes to be made. The author, therefore, considers the monocotyledons and the ranalean dicotyledons as two oxtreme wings of a single natural unit, with the Annonaceae, Aristolochiaceae, Nymphaeaceae, and Piperaceae as connecting links. Within the monocotyledonous wing, 12 natural units of higher than ordinal level (superorders) may be tentatively recognized and arranged according to the number of dicotyledonous features they possess and to the degree of their systematic isolation. Whereas the groups which presE'nt at least a few clearly dicotyledonous characters (like Arales and Helobiae) occupy a more isolated position, the reduction or absence of dicotyledonous characters (as in the anemophilous monocotyledons) is accompanied by decreasing isolation. This indicates that among monocotyledons which have attained a high evolutionary level, convergence largely camouflages relationship. .For more than half a century the fact has been acknowledged that certain characters, widely distributed among, and generally attributed to, the monocotyledons, occur sporadically in the dicotyledons as weD, particularly within the ranalean orders. The occurrence of these monocotyledon-features outside the monocotyledons present a considerable problem in angiosperm classification, especially if one takes into account how few characters form the basis of our current definition of the monocotyledons. This overlap of characters is reflected in most modern treatments of angiosperm classification by the definition of monocotyledons as an early and strongly specialized offshoot of the ranalean group, an opinion against which there is little objection, provided it is admitted that differentiation took place before the recent orders and families had emerged.

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Seedlings of Nymphaeaceae

Cited by 41 publications

References 15 publications

Origine et étapes de la monocotylie chez les Monocotylédones. III—L'embryon desNymphaeaceae: une forme intermédiaire entre Dicotylédones et Monocotylédones

Origine et étapes de la monocotylie chez les Monocotylédones. III—L'embryon desNymphaeaceae: une forme intermédiaire entre Dicotylédones et Monocotylédones

<b>Fruit and seed biometry and germination of <i>Victoria amazonica</i> (Poepp.) J.C. Sowerby (Nymphaeaceae) from the Pantanal floodplain

The Treatment of the Monocotyledons in an Evolutionary System of Classification

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