Boron in Soils and Plants pp 171-174 | Cite as
Composition of root exudates and root bleeding sap of a boron-efficient and inefficient oilseed rape genotype
Abstract
A solution culture study examined the influence of boron (B) supply on the composition of root exudates and bleeding sap of oilseed rape (Brassica napus L.) cultivars which differed in B efficiency. For both cultivars, root exudation of K and NO3 was not affected by B supply. However, B deficiency reduced soluble sugars in root exudates of the B-inefficient cultivar, but not those of the B-efficient cultivar. In root exudates, the total amount of amino acids was not changed, but its composition changed under B deficient conditions. Among the individual amino acids, exudation of tyrosine (Tyr) was specific for the B efficient cultivar under B-deficient conditions. Under B-deficient condition, the amount of root bleeding sap, and its amino acids and soluble sugars content were significantly depressed in the B-inefficient cultivar, but not in the efficient one. Among the detected amino acids in root bleeding sap, the concentration of glutamine, alanine, serine, and Tyr were more strongly suppressed under B deficient conditions in the B-inefficient cultivar. This further suggests that Tyr has some relationship with B efficiency
Key words
bleeding sap boron deficiency exudates rape genotypesPreview
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References
- Belver A, Roldan M, Rodriguez-Rosales M P and Donaire J P 1988 Plant senescence in relation to boron. Plant Physiol. Biochem. 26,383–388.Google Scholar
- Blaser-Grill J, Knoppik J D, Amberger A and Goldbach H 1989 Influence of boron on membrane potential in Elodea densa and Helianthus annuus and H+ extrusion of suspension cultured Dan-eus carota cells. Plant Physiol. 90, 280–284.PubMedCrossRefGoogle Scholar
- Cao X 1996 The research on root physiology of two rape genotypes responding differently to boron deficiency. Ph D thesis. Huazhong Agric. University, Wuhan, PR China. (In Chinese with English abstract).Google Scholar
- Cao X, Fu F and Liu W 1995 The effect of boron on the pH of nutrient solution in several crops. J. Huazhong Agricultural University. Sup. Sum. 21, 28–30. (In Chinese with English abstract).Google Scholar
- Hoagland D R and Arnon D I 1950 The water-culture method for growing plants without soil. In California Agricultural Experiment Station Circular 347. The College of California, Berkeley, CA.Google Scholar
- Liu C and Chen Z 1986 Boron nutrition of oilseed crops. In Research and Application of Micronutrient Fertilizers, Ed. Agriculture Bureau of the Ministry of Agriculture. pp 112–134. Hubei Science and Technology Press, Wuhan. (In Chinese).Google Scholar
- Nanjing Agricultural University 1986 The Analysis of Soils, Plants and Fertilizers. Chinese Agriculture Press, Beijing. pp 214–254. (In Chinese).Google Scholar
- Peng Q, Pi M and Liu W 1995 Screening of rape cultivars in response differently to boron deficiency. J. Huazhong Agricultural University. Sup. Sum. 21, 92–97. (In Chinese with English abstract).Google Scholar
- Wang Y and Lan L 1995a A study on boron efficiency of rape (Brassica napus L.) (I). J. Huazhong Agricultural University. Sup. Sum. 21, 71–78. (In Chinese with English abstract).Google Scholar
- Wang Y and Lan L 1995b A study on boron efficiency of rape (Brassica napus L.) (II). J. Huazhong Agricultural University. Sup. Sum. 21, 79–82. (In Chinese with English abstract).Google Scholar
- Wu L 1995 The study on interaction of boron and plant hormone. J. Huazhong Agricultural University. Sup. Sum. 21, 18–20. (In Chinese with English abstract).Google Scholar
- Xiong S, Wu L and Wang Y 1995 Absorption and distribution of boron in different varieties of rape (Brassica napus L.). J. Huazhong Agricultural University. Sup. Sum. 21, 85–91. (In Chinese with English abstract).Google Scholar
- Yang Y, Xuc J, Ye Z and Wang K 1993 Responses of rape genotypes to boron application. Plant and Soil 155/156, 321–324.CrossRefGoogle Scholar