ISSN:
1573-5036
Keywords:
genetic differentiation
;
Glomus fasciculatum
;
growth analysis
;
P efficiency
;
Plantago major
;
vesicular-arbuscular mycorrhiza
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract To study possible adaptive mechanisms inbred lines from three populations of Plantago major from sites that were found to differ in P availability were compared. In a pot experiment the growth and P uptake either in the presence or absence of Glomus fasciculatum was determined. Under these P-limited conditions it was shown by partitioning the relative growth rate (RGR, in mg g-1 day-1) in the components root weight ratio (RWR, in groots gplant -1), specific P uptake rate (SPUR, in μmol P groots -1 day-1), and P-efficiency (PEFF, in mg μmol P-1), that the increase in RGR of mycorrhizal infected plants was related to an increase in SPUR, and a decrease in RWR and PEFF. P. major ssp. major had a lower RGR (related to a lower PEFF and SPUR) and a higher RWR than P. major ssp. pleiosperma. In a second experiment three inbred lines were compared upon P depletion in a nutrient solution. The P. major ssp. major line had a lower RGR and higher RWR, and a higher accumulation of P in the roots than the P. major ssp. pleiosperma lines under optimal growing conditions. There were no differences among the inbred lines in the relative contribution of inorganic P to the total P concentration in the shoot. The results are discussed in relation to the characteristics of the habitats of the investigated P. major populations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00011267
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