Effect of mineral sulphur availability on nitrogen and sulphur uptake and remobilization during the vegetative growth of Brassica napus L.
Effect of mineral sulphur availability on nitrogen and sulphur uptake and remobilization during the vegetative growth of Brassica napus L.
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DOI：
10.1093/jxb/erq096
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发表时间：
2010-06
影响因子：
6.9
通讯作者：
Ourry A
中科院分区：
文献类型：
--
作者：
Abdallah M;Dubousset L;Meuriot F;Etienne P;Avice JC;Ourry A
由于油菜对硫的需求量大，对硫的限制特别敏感。然而，S限制的生理效应尚不清楚，特别是在莲座期。为此，本研究在300 μM 34SO42 -（对照植株；+S）和15 μM 34SO42 -（限S植株；- S）条件下，测定矿质S限制对油菜营养生长过程中全株和叶阶水平氮素和S吸收和再动员的影响。结果表明，与对照植物相比，s限制植物在全株和叶片生物量以及氮吸收方面均无显著差异。然而，35 d后，全株和叶片的总S和34S（即来自S吸收的S）含量大大降低，并且观察到更多的内源S从叶片重新分配给根系。根系中基质和质膜硫酸盐转运蛋白的相对表达也被强烈诱导。综上所述，尽管S限制植物的矿物S含量比对照植物少20倍，但它们的发育却出人意料地保持不变。在S限制期间，油菜能够将内源S化合物（主要是硫酸盐）从叶片再循环到根系。然而，这种生理适应可能只在短时间内有效（即营养生长）。
Because it has a high demand for sulphur (S), oilseed rape is particularly sensitive to S limitation. However, the physiological effects of S limitation remain unclear, especially during the rosette stage. For this reason a study was conducted to determine the effects of mineral S limitation on nitrogen (N) and S uptake and remobilization during vegetative growth of oilseed rape at both the whole-plant and leaf rank level for plants grown during 35 d with 300 μM 34SO42– (control plants; +S) or with 15 μM 34SO42– (S-limited plants; –S). The results highlight that S-limited plants showed no significant differences either in whole-plant and leaf biomas or in N uptake, when compared with control plants. However, total S and 34S (i.e. deriving from S uptake) contents were greatly reduced for the whole plant and leaf after 35 d, and a greater redistribution of endogenous S from leaves to the benefit of roots was observed. The relative expression of tonoplast and plasmalemma sulphate transporters was also strongly induced in the roots. In conclusion, although S-limited plants had 20 times less mineral S than control plants, their development remained surprisingly unchanged. During S limitation, oilseed rape is able to recycle endogenous S compounds (mostly sulphate) from leaves to roots. However, this physiological adaptation may be effective only over a short time scale (i.e. vegetative growth).
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影响因子：
6.9
作者：
Kopriva, S;Rennenberg, H
通讯作者：
Rennenberg, H
影响因子：
4.3
作者：
DIETZ, KJ
通讯作者：
DIETZ, KJ
影响因子：
7.4
作者：
FRIEDRICH, JW;SCHRADER, LE
通讯作者：
SCHRADER, LE
影响因子：
2.6
作者：
Blake-Kalff, MMA;Zhao, FJ;McGrath, SP
通讯作者：
McGrath, SP
影响因子：
5.2
作者：
Fismes, J;Vong, PC;Frossard, E
通讯作者：
Frossard, E