caa a22 4500 477133622 CHVBK 20180405111711.0 cr unu---uuuuu 170330e19971201xx s 000 0 eng 10.1023/A:1003113131989 doi (NATIONALLICENCE)springer-10.1023/A:1003113131989 Variation in root hairs of barley cultivars doubled soil phosphorus uptake [Elektronische Daten] [Tara Gahoonia, Niels Nielsen] Length and density (number mm-1 root) of root hairs of two barley (Hordeum vulgare L.) cultivars Salka and Zita and their capability to absorb phosphorus (P) from nutrient solution as well as from rhizosphere soil were studied. The cultivars were chosen because they differed most among 30 cultivars in ability to absorb P from low P soil in two field conditions. In nutrient solution culture, Salka had 32±4 root hairs mm-1 root, 1.02±0.22 mm long. Zita had 21±3 hairs mm-1 root, 0.54±0.14 mm long. In soil, the root hairs of both the cultivars were slightly longer (Salka 1.10 ±0.16 mm; Zita 0.63±0.18 mm) than in solution culture but the difference was non-significant (p<0.05). The root hairs increased the effective root surface area of Salka by 206% and that of Zita by 81%. In solution culture, Salka produced 163±9 m g-1 and Zita 153±11 m g-1 dry roots in 21 days. Salka produced 1.65±0.22 g and Zita 1.51±0.31 g of green dry matter (DM). The cultivars did not differ in uptake of P from nutrient solution culture. The P content of DM was 0.42±0.1% in Salka and 0.41±0.08% in Zita. In soil, Salka depleted two times more P from rhizosphere than Zita. The longer root hairs of Salka increased the extension of the depletion zone for NaHCO3-Pi (inorganic P extracted with 0.5 M NaHCO3) in the rhizosphere. The cultivars also depleted NaOH-Pi (inorganic P extracted with 0.1 M NaOH) from the rhizosphere soil, but the difference between the cultivars was non-significant (p<0.05). The results suggested that the ability of Salka to absorb more inorganic soil P was due to its longer and denser root hairs. Kluwer Academic Publishers, 1997 Genetic nationallicence mineral nutrition nationallicence phosphorus nationallicence rhizosphere nationallicence root hairs nationallicence Gahoonia Tara Department of Agricultural Sciences, Plant Nutrition and Soil Fertility Laboratory, The Royal Veterinary and Agricultural University, Thorvalsensvej 40, DK-1871, Frederiksberg C, Copenhagen, Denmark aut Nielsen Niels Department of Agricultural Sciences, Plant Nutrition and Soil Fertility Laboratory, The Royal Veterinary and Agricultural University, Thorvalsensvej 40, DK-1871, Frederiksberg C, Copenhagen, Denmark aut Euphytica Kluwer Academic Publishers 98/3(1997-12-01), 177-182 0014-2336 98:3<177 1997 98 10681 https://doi.org/10.1023/A:1003113131989 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1003113131989 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gahoonia Tara Department of Agricultural Sciences, Plant Nutrition and Soil Fertility Laboratory, The Royal Veterinary and Agricultural University, Thorvalsensvej 40, DK-1871, Frederiksberg C, Copenhagen, Denmark aut NATIONALLICENCE 700 1- Nielsen Niels Department of Agricultural Sciences, Plant Nutrition and Soil Fertility Laboratory, The Royal Veterinary and Agricultural University, Thorvalsensvej 40, DK-1871, Frederiksberg C, Copenhagen, Denmark aut NATIONALLICENCE 773 0- Euphytica Kluwer Academic Publishers 98/3(1997-12-01), 177-182 0014-2336 98:3<177 1997 98 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer