Implications of the Formation of the Graft Union for Organisation in the Intact Plant

Yeoman, M. M.; Brown, Rex V.

doi:10.1093/oxfordjournals.aob.a085247

Cited by 37 publications

(37 citation statements)

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“…Datura stramonium, which has previously been shown to be graft-compatible with both Nicandra and Lycopersicon (Yeoman & Brown, 1976). In each of the six possible graft combinations, the number of WVMs was again determined at day 14.…”

Section: Resultsmentioning

confidence: 99%

“…Previous research on graft development (Lindsay, 1972;Lindsay et al, 1974;Miedzybrodzka, 1980) and graft incompatibility (Yeoman & Brown, 1976;Yeoman et al, 1978) using whole-plant grafts of herbaceous solanaceous species has demonstrated that graft survival is ensured by two major features of compatible grafts: (1) the presence of numerous trans-union vascular connections which presumably restore a flow of water and nutrients to the scion, and (2) the attainment of sufficient mechanical strength at the graft union to support the scion. In contrast, the development of incompatible whole-plant grafts is characterized by the absence of functional trans-union xylem connections (Yeoman et al, 1978), and the original xylem elements close to the graft union may become blocked with tyloses and is therefore unable to transport water and solutes (C. E. Jeffree, unpublished results).…”

Section: Discussionmentioning

confidence: 99%

“…In contrast, the development of incompatible whole-plant grafts is characterized by the absence of functional trans-union xylem connections (Yeoman et al, 1978), and the original xylem elements close to the graft union may become blocked with tyloses and is therefore unable to transport water and solutes (C. E. Jeffree, unpublished results). While the mechanical strength of compatible whole-plant grafts rapidly becomes sufficient to support the scion under greenhouse conditions and soon reaches that of ungrafted internodes (Lindsay et al, 1974), incompatible whole-plant heterografts only attain a fraction of the strength of whole-plant homografts (Yeoman & Brown, 1976).…”

Section: Discussionmentioning

confidence: 99%

“…Yeoman & Brown (1976) and Yeoman et al (1978) showed that incompatible heterografts develop less mechanical strength and fewer trans-union xylem connections than compatible grafts. It is still not clear, however, whether the basis of an incompatible response is determined by long-range interactions operating at the level of the whole plant, or as suggested by Yeoman (1984) and Holden, Jeffree & Yeoman (1987), by local interactions between the opposing cells of the graft union itself.…”

Section: Introductionmentioning

confidence: 99%

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Incompatibility in Cultured Explant‐grafts Between Members of the Solanaceae

1987

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SUMMARYThe development in culture of explant-grafts between compatible and incompatible combinations of three solanaceous species parallels that of the corresponding whole-plant grafts in respect of the pattern of vascular development and the functional status of the vascular system. In culture, incompatible explant-grafts attain greater mechanical strength than corresponding whole-plant grafts, and consequently tbis parameter of their development is an unsuitable criterion for judging the compatibility of explant-grafts. The findings demonstrate that graft compatibility/incompatibility is determined by local factors operating close to the graft union, possibly at a cellular level between the opposing cells of stock and scion. Explant grafting in culture offers an ideal system for experimental analysis of the cellular basis of incompatibility in internode grafting.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Incompatibility in Cultured Explant‐grafts Between Members of the Solanaceae

1987

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“…Observou-se a continuidade vascular ligando os tecidos do enxerto aos do porta-enxerto. O restabelecimento da continuidade vascular na zona de interface é considerado por Yeoman & Brown (1976) e Moore (1984) um evento crítico que determina a formação de combinações compatíveis entre enxerto e porta-enxerto durante a reconexão. Contrariando essas afirmações, Herrero (1951) observou plantas enxertadas de pessegueiro e ameixeira sobrevivendo normalmente por alguns anos, mesmo na ausên-cia de continuidade vascular, sugerindo que este evento não está necessariamente relacionado ao sucesso do pegamento dos enxertos e tampouco à compatibilidade e incompatibilidade entre os tecidos envolvidos.…”

Section: Resultsunclassified

Enxertia in vitro na propagação de clones de Eucalyptus urophylla e E. grandis

Bandeira

Xavier²,

Otoni³

et al. 2006

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar a eficiência da enxertia in vitro na propagação de dois clones híbridos de Eucalyptus urophylla e E. grandis. Foram utilizados porta-enxertos juvenis obtidos de sementes de E. grandis e E. urophylla germinadas in vitro. As plantas enxertadas apresentaram pegamento de até 93% aos 50 dias de idade para as combinações de enxerto e porta-enxerto. Quanto ao crescimento em altura, verificaramse melhores resultados em relação ao porta-enxerto E. urophylla. A análise histológica das plantas enxertadas comprovou a eficiência do processo de cicatrização do calo formado na região de conexão, seguida da reconstituição vascular.Termos para indexação: propagação clonal, rejuvenescimento clonal, cultura de tecidos. In vitro grafting in the propagation of Eucalyptus urophylla and E. grandis clonesAbstract -The objective of this work was to evaluate the efficiency of the in vitro grafting in the propagation of two Eucalyptus urophylla and E. grandis hybrid clones. Juvenile stocks obtained from seeds of E. grandis and E. urophylla germinated in vitro were used. The grafted plants showed success up to 93% at 50 days for the scion and stock combinations. The highest final plant height values were observed when the stock was E. urophylla. Histologic analysis showed that cicatrized callus in the connection region was successfully followed by vascular recomposition in different combinations among scion with rootstocks.

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Studies of Vegetative Compatibility‐incompatibility in Higher Plants. I. A Structural Study of a Compatible Autograft in Sedum Telephoides (Crassulaceae)

Moore

Walker

1981

American J of Botany

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Initial adherence of the cut surfaces occurred by 24 hr after grafting and was correlated both with a pronounced dictyosome activity along the graft interface and with callus proliferation in both the stock and scion. A necrotic layer of one or two collapsed cells in thickness initially extended as a continuous barrier between the stock and scion, but the layer was fragmented by 2–3 days after grafting as the callus proliferation continued. Graft incision also induced a mild senescence in cells at the graft interface characterized by a reduced staining intensity of the cytoplasm, replacement of the large primary vacuole by numerous smaller vacuoles, and the occurrence of flocculent material throughout the cytoplasm. Starch accumulated during the first day after grafting but disappeared by 2–3 days after grafting. The cellular senescence never proceeded beyond an early, nonlethal stage, and cells along the graft interface completely recovered by 3 wk after grafting. Procambial differentiation occurred across the callus bridge by 10 days after grafting, and mature vascular continuity was established by 14 days. The results of this study are discussed relative to cellular recognition phenomena and to proposed mechanisms for plant graft compatibility‐incompatibility.

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Implications of the Formation of the Graft Union for Organisation in the Intact Plant

Cited by 37 publications

References 9 publications

Incompatibility in Cultured Explant‐grafts Between Members of the Solanaceae

Incompatibility in Cultured Explant‐grafts Between Members of the Solanaceae

Enxertia in vitro na propagação de clones de Eucalyptus urophylla e E. grandis

Studies of Vegetative Compatibility‐incompatibility in Higher Plants. I. A Structural Study of a Compatible Autograft in Sedum Telephoides (Crassulaceae)

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