Record ID No. |
1970 |
Author(s) |
Colla G., Rouphael Y., Cardarelli M., Tullio M., Rivera C.M., Rea E , 2008 |
Affiliation |
Tuscia University , Dipartimento Geol & Ingn Meccan, I-01100 Viterbo, ITALY |
Title |
Alleviation of salt stress by arbuscular mycorrhizal in zucchini plants grown at low and high phosphorus concentration |
Source. Vol.(no):Page |
Biology and Fertility of Soils.44(3):501-509p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Biochemistry |
Sub-subjects |
Miscellaneous |
Organism |
n.a. |
Country |
ITALY, Europe |
Abstracts |
With the aim of determining whether the arbuscular mycorrhizal (AM) inoculation
would give an advantage to overcome salinity problems and if the phosphorus (P) concentration can
profoundly influence zucchini (Cucurbita pepo L.) plant responses to AM, a greenhouse experiment
was carried out with AM (+AM) and non-AM (-AM). Plants were grown in sand culture with two levels
of salinity (1 and 35 mM NaCl, giving electrical conductivity values of 1.8 and 5.0 dS m(-1)) and
P (0.3 and 1 mM P) concentrations. The percentages of marketable yield and shoot biomass
reduction caused by salinity were significantly lower in the plants grown at 0.3 mM P, compared
to those grown at 1 mM P. However, even at high P concentration, the absolute value of yield and
shoot biomass of +AM zucchini plants grown under saline conditions was higher than those grown at
low P concentration. The +AM plants under saline conditions had higher leaf chlorophyll content
and relative water content than -AM. Mycorrhizal zucchini plants grown under saline conditions
had a higher concentration of K and lower Na concentration in leaf tissue compared to -AM plants.
The P content of zucchini leaf tissue was similar for +AM and -AM treatments at both low and high
P concentrations in the saline nutrient solution. The beneficial effects of AM on zucchini plants
could be due to an improvement in water and nutritional status (high K and low Na accumulation).
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