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Mechanism responsible for restricted boron concentration in plant shoots grafted on pumpkin rootstocks
Year:
2011
Source of publication :
Israel Journal of Plant Sciences
Authors :
Ben-Hur, Meni
;
.
Edelstein, Menahem
;
.
Leib, Lea
;
.
Plaut, Zvi
;
.
Volume :
59
Co-Authors:
Edelstein, M., Department of Vegetable Research, Agricultural Research Organization, Newe Ya'ar Research Center, P.O. Box 1021, Ramat Yishay 30095, Israel
Ben-Hur, M., Institute of Soil, Water and Environmental Sciences, Volcani Center, Agricultural Research Organization, P.O. Box. 6, Bet Dagan 50250, Israel
Leib, L., Institute of Soil, Water and Environmental Sciences, Volcani Center, Agricultural Research Organization, P.O. Box. 6, Bet Dagan 50250, Israel
Plaut, Z., Institute of Soil, Water and Environmental Sciences, Volcani Center, Agricultural Research Organization, P.O. Box. 6, Bet Dagan 50250, Israel
Facilitators :
From page:
207
To page:
215
(
Total pages:
9
)
Abstract:
The use of wastewater as an alternative water source for irrigation needs specific studies since this water contains organic matter, salt, heavy metals and high boron concentrations, which may be toxic to many crops. Grafting of vegetable plants became a common practice with the main goals to control soil-borne diseases and nematodes and improve tolerance to environmental stresses such as flooding, salinity and high boron concentrations. The aim of the present study was to explore how boron damage to melon plants under wastewater irrigation is reduced by grafting onto pumpkin rootstocks. Six melon/pumpkin combinations were examined. Boron decreased shoot and root dry weights of all plant types, but by much less in those with pumpkin root systems than in those on melon roots, indicating that pumpkins are more boron-tolerant than melons and can impart this tolerance onto plants grafted on them. Boron concentrations in roots were much lower than in shoots, and similar in all plant types, implying that boron was not retained within the pumpkin root system. Shoot dry weights were much higher in plants grafted on pumpkin than in those grafted on melon, therefore transpiration rates and consequently boron transport to the shoots were expected to be higher in the former; in fact, they were significantly lower, implying that boron exclusion by the pumpkin root system at least partly accounted for the lower boron damage to plants grafted onto pumpkin. The concentrations of boron in xylem sap exudates were significantly lower for plants with pumpkin root systems than for those on melon roots, and exudation rates were markedly higher for the former, regardless of boron concentrations. However, the total amounts of boron exuded from plants grafted on pumpkin were still lower than those from plants grafted on melon, indicating that pumpkin roots blocked boron uptake from the growth media, to some extent. The study demonstrates that pumpkin root systems are capable of partially excluding boron when its concentrations in the growing media is high, thus avoiding damage to boron-sensitive plants, such as melons grafted onto pumpkins. The grafting technique can thus be adopted for agricultural setups where effluents with high boron concentration are used for irrigation. © 2011 Science From Israel / LPPltd.
Note:
Related Files :
Boron
Cucurbita
Environmental stress
Nematoda
retention
transpiration
Wastewater
Show More
Related Content
More details
DOI :
10.1560/IJPS.59.2-4.207
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
19767
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:31
Scientific Publication
Mechanism responsible for restricted boron concentration in plant shoots grafted on pumpkin rootstocks
59
Edelstein, M., Department of Vegetable Research, Agricultural Research Organization, Newe Ya'ar Research Center, P.O. Box 1021, Ramat Yishay 30095, Israel
Ben-Hur, M., Institute of Soil, Water and Environmental Sciences, Volcani Center, Agricultural Research Organization, P.O. Box. 6, Bet Dagan 50250, Israel
Leib, L., Institute of Soil, Water and Environmental Sciences, Volcani Center, Agricultural Research Organization, P.O. Box. 6, Bet Dagan 50250, Israel
Plaut, Z., Institute of Soil, Water and Environmental Sciences, Volcani Center, Agricultural Research Organization, P.O. Box. 6, Bet Dagan 50250, Israel
Mechanism responsible for restricted boron concentration in plant shoots grafted on pumpkin rootstocks
The use of wastewater as an alternative water source for irrigation needs specific studies since this water contains organic matter, salt, heavy metals and high boron concentrations, which may be toxic to many crops. Grafting of vegetable plants became a common practice with the main goals to control soil-borne diseases and nematodes and improve tolerance to environmental stresses such as flooding, salinity and high boron concentrations. The aim of the present study was to explore how boron damage to melon plants under wastewater irrigation is reduced by grafting onto pumpkin rootstocks. Six melon/pumpkin combinations were examined. Boron decreased shoot and root dry weights of all plant types, but by much less in those with pumpkin root systems than in those on melon roots, indicating that pumpkins are more boron-tolerant than melons and can impart this tolerance onto plants grafted on them. Boron concentrations in roots were much lower than in shoots, and similar in all plant types, implying that boron was not retained within the pumpkin root system. Shoot dry weights were much higher in plants grafted on pumpkin than in those grafted on melon, therefore transpiration rates and consequently boron transport to the shoots were expected to be higher in the former; in fact, they were significantly lower, implying that boron exclusion by the pumpkin root system at least partly accounted for the lower boron damage to plants grafted onto pumpkin. The concentrations of boron in xylem sap exudates were significantly lower for plants with pumpkin root systems than for those on melon roots, and exudation rates were markedly higher for the former, regardless of boron concentrations. However, the total amounts of boron exuded from plants grafted on pumpkin were still lower than those from plants grafted on melon, indicating that pumpkin roots blocked boron uptake from the growth media, to some extent. The study demonstrates that pumpkin root systems are capable of partially excluding boron when its concentrations in the growing media is high, thus avoiding damage to boron-sensitive plants, such as melons grafted onto pumpkins. The grafting technique can thus be adopted for agricultural setups where effluents with high boron concentration are used for irrigation. © 2011 Science From Israel / LPPltd.
Scientific Publication
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