کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10841208 | 1067884 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nutrient uptake, cluster root formation and exudation of protons and citrate in Lupinus albus as affected by localized supply of phosphorus in a split-root system
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Nutrient uptake, cluster root formation and exudation of protons and citrate in Lupinus albus as affected by localized supply of phosphorus in a split-root system Nutrient uptake, cluster root formation and exudation of protons and citrate in Lupinus albus as affected by localized supply of phosphorus in a split-root system](/preview/png/10841208.png)
چکیده انگلیسی
White lupin (Lupinus albus L. cv. Amiga) plants were grown in nutrient solution, using a split-root system with two compartments to examine the effect of localized phosphorus (P) supply on nutrient uptake, cluster root formation and root exudation. Phosphorus was supplied at 0 and 250 μM P in the âP and +P compartments, respectively, with three treatments of âP+P, âPâP and +P+P. Shoot dry weight in âP+P was higher than that in âPâP, but not significantly different from that in +P+P. Shoot P concentration [P] in âP+P was lower than that in +P+P, but higher than that in âPâP. In the âP+P treatment, root [P] was lower in the âP than in the +P root half and the similar trend was observed for root dry weight. Compared with âPâP, 19% of P uptake in the +P root half in âP+P was translocated to the âP root half. Phosphorus deficiency decreased K, Mg and S uptake in âPâP, and localized P deficiency reduced S uptake in the âP root half in âP+P. The number of cluster roots and exudation rates of protons, citrate and acid phosphatase (APase) in both root halves were higher in âPâP than in +P+P. The localized P supply increased the total number of cluster roots in the +P root half compared with the âP root half in âP+P. Compared with âPâP, the localized P supply significantly increased the shoot [P] and decreased the exudation rate of citrate and APase in both root halves in âP+P. Exudation rate of citrate in the âP root half in âP+P was higher than that of the +P root half in +P+P. Localized P supply reduced proton release in the +P and even âP root halves in âP+P, but the pH was lower in the âP than +P compartments for the individual plant, indicating a significant effect of the localized P supply on proton release. The results suggest that cluster root formation and citrate exudation are regulated by the shoot [P] and affected by localized supply of external P, and that proton release is inhibited by localized P supply by altering the balance of anion and cation uptake.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Science - Volume 168, Issue 3, March 2005, Pages 837-845
Journal: Plant Science - Volume 168, Issue 3, March 2005, Pages 837-845
نویسندگان
J. Shen, H. Li, G. Neumann, F. Zhang,