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Possible mechanisms for graft incompatibility between melon scions and pumpkin rootstocks
Year:
2008
Source of publication :
Acta Horticulturae
Authors :
Aloni, Benyamin
;
.
Cohen, Roni
;
.
Deventurero, Gila
;
.
Edelstein, Menahem
;
.
Horev, Carmela
;
.
Joel, Daniel M.
;
.
Kapulnik, Yoram
;
.
Karni, Leah
;
.
Katzir, Nurit
;
.
Levin, Ziv
;
.
Volume :
782
Co-Authors:
Aloni, B., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Bet-Dagan, 50250, Israel
Karni, L., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Bet-Dagan, 50250, Israel
Deventurero, G., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Bet-Dagan, 50250, Israel
Levin, Z., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Bet-Dagan, 50250, Israel
Cohen, R., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Neve Yaar, Israel
Katzir, N., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Neve Yaar, Israel
Lotan-Pompan, M., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Neve Yaar, Israel
Edelstein, M., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Neve Yaar, Israel
Aktas, H., Harran University, Faculty of Agriculture, Department of Horticulture, 63040 Sanliurfa, Turkey
Turhan, E., Canakkale, Onsekiz Mart University, Boyramic Vocational College, 17700 Boyramic/Canakkale, Turkey
Joel, D.M., Division of Weed Research, A.R.O. the Volcani Center, Newe-Ya'ar, Israel
Horev, C., Division of Weed Research, A.R.O. the Volcani Center, Newe-Ya'ar, Israel
Kapulnik, Y., Dept. of Agronomy and Natural Resources, A.R.O. the Volcani Center, B.O.B. 6, Bet-Dagan, 50250, Israel
Facilitators :
From page:
313
To page:
323
(
Total pages:
11
)
Abstract:
The successful application of the grafting technique depends on the identification of stress and pathogen-resistant rootstock (RS), and on the compatibility of the grafted union in terms of fast formation of the vascular connections between the rootstock and the scion and rapid resumption of root and shoot growth. A series of studies, using compatible and incompatible Cucurbita rootstocks, grafted with melon (Cucumis melo L.) scion ('Arava'), were conducted in order to identify metabolic and physiological factors which may be associated with the level of grafting compatibility. In order to increase the differential compatibilities, the grafted seedlings were exposed to either control (22/28°C) or high (28/35°C) temperature conditions starting at 7 days after grafting. Grafting compatibility was dependent on temperature conditions. Twenty days from grafting the rootstock part collapsed only in the non-compatible grafted seedlings under high temperatures but not under normal temperatures. Water uptake and sugar distribution between plant canopy and root measured 14 days under these conditions, and before incompatible transplants collapsed, were not correlated with the differential compatibility. At that stage histo-chemical staining showed that reactive oxygen species (ROS) generation was enhanced under high temperatures in the grafting zone in both compatible and incompatible graft combinations. In this paper we describe a mechanism which may be responsible for grafting incompatibility between Cucurbita RS and melon scion. We suggest that upon formation of the RS-scion continuum, the hormonal balance, especially of auxin and ethylene, required for proper root development, is impaired in incompatible grafting union. This impairment is initiated by the auxin, transported from the scion to the root, which in incompatible RS, triggers ethylene production, ROS generation and root growth inhibition and degeneration. In compatible RS, a variety of mechanisms may operate to either reduce auxin activity in the RS and/or reduce ROS production and activity.
Note:
Related Files :
Auxin
Compatibility
Cucumis
Cucumis melo
Cucurbita
ethylene
high temperature
oxidative stress
Pumpkin
Rootstock
Show More
Related Content
More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
Conference paper
;
.
Language:
English
Editors' remarks:
ID:
21237
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:42
Scientific Publication
Possible mechanisms for graft incompatibility between melon scions and pumpkin rootstocks
782
Aloni, B., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Bet-Dagan, 50250, Israel
Karni, L., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Bet-Dagan, 50250, Israel
Deventurero, G., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Bet-Dagan, 50250, Israel
Levin, Z., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Bet-Dagan, 50250, Israel
Cohen, R., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Neve Yaar, Israel
Katzir, N., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Neve Yaar, Israel
Lotan-Pompan, M., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Neve Yaar, Israel
Edelstein, M., Dept. of Vegetable Research, Institute of Plant Science, A.R.O. the Volcani Center, Neve Yaar, Israel
Aktas, H., Harran University, Faculty of Agriculture, Department of Horticulture, 63040 Sanliurfa, Turkey
Turhan, E., Canakkale, Onsekiz Mart University, Boyramic Vocational College, 17700 Boyramic/Canakkale, Turkey
Joel, D.M., Division of Weed Research, A.R.O. the Volcani Center, Newe-Ya'ar, Israel
Horev, C., Division of Weed Research, A.R.O. the Volcani Center, Newe-Ya'ar, Israel
Kapulnik, Y., Dept. of Agronomy and Natural Resources, A.R.O. the Volcani Center, B.O.B. 6, Bet-Dagan, 50250, Israel
Possible mechanisms for graft incompatibility between melon scions and pumpkin rootstocks
The successful application of the grafting technique depends on the identification of stress and pathogen-resistant rootstock (RS), and on the compatibility of the grafted union in terms of fast formation of the vascular connections between the rootstock and the scion and rapid resumption of root and shoot growth. A series of studies, using compatible and incompatible Cucurbita rootstocks, grafted with melon (Cucumis melo L.) scion ('Arava'), were conducted in order to identify metabolic and physiological factors which may be associated with the level of grafting compatibility. In order to increase the differential compatibilities, the grafted seedlings were exposed to either control (22/28°C) or high (28/35°C) temperature conditions starting at 7 days after grafting. Grafting compatibility was dependent on temperature conditions. Twenty days from grafting the rootstock part collapsed only in the non-compatible grafted seedlings under high temperatures but not under normal temperatures. Water uptake and sugar distribution between plant canopy and root measured 14 days under these conditions, and before incompatible transplants collapsed, were not correlated with the differential compatibility. At that stage histo-chemical staining showed that reactive oxygen species (ROS) generation was enhanced under high temperatures in the grafting zone in both compatible and incompatible graft combinations. In this paper we describe a mechanism which may be responsible for grafting incompatibility between Cucurbita RS and melon scion. We suggest that upon formation of the RS-scion continuum, the hormonal balance, especially of auxin and ethylene, required for proper root development, is impaired in incompatible grafting union. This impairment is initiated by the auxin, transported from the scion to the root, which in incompatible RS, triggers ethylene production, ROS generation and root growth inhibition and degeneration. In compatible RS, a variety of mechanisms may operate to either reduce auxin activity in the RS and/or reduce ROS production and activity.
Scientific Publication
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