Programmed cell death and leaf morphogenesis in Monstera obliqua (Araceae)

Gunawardena, Arunika H. L. A. N.; Sault, Kathy; Donnelly, Petra M.; Greenwood, John S.; Dengler, Nancy G.

doi:10.1007/s00425-005-1545-1

Cited by 60 publications

(43 citation statements)

References 30 publications

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“…Examples of developmentally regulated PCD include elimination of transitory organs and tissues (Filonova et al 2008;Helmersson et al 2008), xylem differentiation (Fakuda et al 1998;Fakuda 2000), and leaf morphogenesis (Gunawardena et al 2004(Gunawardena et al , 2005 as is seen in the lace plant (Aponogeton madagascariensis) and Monstera.…”

Section: Introductionmentioning

confidence: 99%

Environmentally induced programmed cell death in leaf protoplasts of Aponogeton madagascariensis

Lord

Gunawardena

2010

Planta

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Within plant systems, two main forms of programmed cell death (PCD) exist: developmentally regulated and environmentally induced. The lace plant (Aponogeton madagascariensis) naturally undergoes developmentally regulated PCD to form perforations between longitudinal and transverse veins over its leaf surface. Developmental PCD in the lace plant has been well characterized; however, environmental PCD has never before been studied in this plant species. The results presented here portray heat shock (HS) treatment at 55 °C for 20 min as a promising inducer of environmental PCD within lace plant protoplasts originally isolated from non-PCD areas of the plant. HS treatment produces cells displaying many characteristics of developmental PCD, including blebbing of the plasma membrane, increased number of hydrolytic vesicles and transvacuolar strands, nuclear condensation, terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling positive nuclei, as well as increased Brownian motion within the vacuole. Results presented here for the first time provide evidence of chloroplasts in the vacuole of living protoplasts undergoing environmentally induced PCD. Findings suggest that the mitochondria play a critical role in the cell death process. Changes in mitochondrial dynamics were visualized in HS-treated cells, including loss of mitochondrial mobility, reduction in ΔΨ(m), as well as the proximal association with chloroplasts. The role of the mitochondrial permeability transition pore (PTP) was examined by pre-treatment with the PTP agonist cyclosporine A. Overall, HS is depicted as a reliable method to induce PCD within lace plant protoplasts, and proves to be a reliable technique to enable comparisons between environmentally induced and developmentally regulated PCD within one species of plant.

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Section: Introductionmentioning

confidence: 99%

Environmentally induced programmed cell death in leaf protoplasts of Aponogeton madagascariensis

Lord

Gunawardena

2010

Planta

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“…The perforated leaf blades of the "adult" foliage of many Monstera species (Fig. 1) result from developmentally regulated programmed cell death (PCD), which is a rather exceptional way of achieving complex leaf shape in the plant kingdom (Gunawardena et al, 2005), and thus deviates from most other cases of heteroblastic changes in leaf shape, a classic example being Hedera helix that produces lobed leaves as "juvenile" and entire leaves as "adult". The "normal", PCD independent molecular determinants of leaf shape, in particular leaf dissection, have been analyzed in A. thaliana and other, phylogenetically distant, plants with diverse modes of leaf margin dissection, leaflet specification, and leaflet development.…”

Section: Regulation Of Leaf Shapementioning

confidence: 99%

Heteroblasty—A Review

2011

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Virtually all plants show a certain degree of variation among individual metamers during ontogeny. In some cases, however, there are abrupt and substantial changes in form and function (e.g. in leaf form, leaf size, phyllotaxy, internode length, anthocyanin pigmentation, rooting ability, or wood structure). These plants were called "heteroblastic" by Karl Goebel more than a century ago, but the functional significance of this type of ontogenetic change, the evolutionary trajectories in different plant groups, even their frequency in the plant kingdom are still unresolved issues. We argue that slow progress is partly due to an on-going terminological confusion and the lack of distinction between other developmental processes such as ontogenetic drift. This review develops a conceptual framework for future scientific work, proposes a quantitative index of heteroblasty, and discusses the evidence for developmental regulation, functional significance, and evolutionary implications of heteroblasty to provide a stimulating basis for further research with this fascinating group of plants.Zusammenfassung Fast alle Pflanzen zeigen während der Individualentwicklung ein gewisses Maß an Variabilität einzelner Metamere. Bei manchen Arten kommt es jedoch zu einer ausgeprägten und sprunghaften Änderung in Form und Funktion (z.B. in Blattform oder -stellung, Internodienlänge, Pigmentierung, Holzstruktur, oder hinsichtlich der Fähigkeit zur Bildung von Adventivwurzeln). Obwohl diese Arten von Karl Goebel schon vor mehr als einem Jahrhundert als "heteroblastisch" beschrieben wurden, sind die funktionelle Bedeutung des Phänomens, dessen Evolution innerhalb einzelner Pflanzengruppen, wie auch die Häufigkeit im Pflanzenreich immer noch weitgehend ungeklärt. Dieser schleppende Fortschritt mag mit einem weit verbreiteten terminologischen Durcheinander und dem Fehlen einer klaren Abgrenzung von anderen Entwicklungsprozessen wie der "ontogenetischen Drift" zusammenhängen. Unser Übersichtsartikel entwickelt einen klaren konzeptionellen Rahmen, um eine Basis zu schaffen für zukünftige Forschungsarbeiten dieses faszinierenden Entwicklungsphänomens. Dazu schlagen wir einen quantitativen Index der Heteroblastie vor, skizzieren den gegenwärtigen Wissens- Bot. Rev. (2011) 77:109-151

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“…(Araceae Juss.) (Gunawardena et al, 2005) and Aponogeton madagascariensis (Mirb.) H. Bruggen (Aponogetonaceae).…”

Section: Introductionunclassified

DNA hypomethylation concomitant with the overproduction of ROS induced by naphthoquinone juglone on tobacco BY-2 suspension cells

Pobořilová

Ohlsson

Berglund

et al. 2015

Environmental and Experimental Botany

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Programmed cell death and leaf morphogenesis in Monstera obliqua (Araceae)

Cited by 60 publications

References 30 publications

Environmentally induced programmed cell death in leaf protoplasts of Aponogeton madagascariensis

Environmentally induced programmed cell death in leaf protoplasts of Aponogeton madagascariensis

Heteroblasty—A Review

DNA hypomethylation concomitant with the overproduction of ROS induced by naphthoquinone juglone on tobacco BY-2 suspension cells

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