000			03937nab a22005057a 4500
001			G90127
003			MX-TxCIM
005			20230912230203.0
008			210702s2007 ne |||p|op||| 00| 0 eng d
022			_a1573-5036 (Online)
022			_a 0032-079X
024	8		_ahttps://doi.org/10.1007/s11104-007-9360-z
040			_aMX-TxCIM
041			_aeng
090			_aCIS-5101
100	0		_aGuntur Venkata Subbarao _92828
245	1	0	_aCan biological nitrification inhibition (BNI) genes from perennial Leymus racemosus (Triticeae) combat nitrification in wheat farming?
260			_aDordrecht (Netherlands) : _bSpringer, _c2007.
340			_aComputer File|Printed
500			_aPeer review
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0032-079X
520			_aUsing a recombinant luminescent Nitrosomonas europaea assay to quantify biological nitrification inhibition (BNI), we found that a wild relative of wheat (Leymus racemosus (Lam.) Tzvelev) had a high BNI capacity and releases about 20 times more BNI compounds (about 30 ATU g−1 root dry weight 24 h−1) than Triticum aestivum L. (cultivated wheat). The root exudate from cultivated wheat has no inhibitory effect on nitrification when applied to soil; however, the root exudate from L. racemous suppressed NO−3 formation and kept more than 90% of the soil’s inorganic-N in the NH+4-form for 60 days. The high-BNI capacity of L. racemosus is mostly associated with chromosome Lr#n. Two other chromosomes Lr#J, and Lr#I also have an influence on BNI production. Tolerance of L. racemosus to NH+4 is controlled by chromosome 7Lr#1-1. Sustained release of BNI compounds occurred only in the presence of NH+4 in the root environment. Given the level of BNI production expressed in DALr#n and assuming normal plant growth, we estimated that nearly 87,500,000 ATU of BNI activity ha−1 day−1 could be released in a field of vigorously growing wheat; this amounts to the equivalent of the inhibitory effect from the application of 52.5 g of the synthetic nitrification inhibitor nitrapyrin (one AT unit of BNI activity is equivalent to 0.6 μg of nitrapyrin). At this rate of BNI production it would take only 19 days for a BNI-enabled wheat crop to produce the inhibitory power of a standard commercial application of nitrapyrin, 1 kg ha−1. The synthetic nitrification inhibitor, dicyandiamide, blocked specifically the AMO (ammonia monooxygenase) pathway, while the BNI from L. racemosus blocked the HAO (hydroxylamine oxidoreductase) pathway in Nitrosomonas. Here we report the first finding of high production of BNI in a wild relative of any cereal and its successful introduction and expression in cultivated wheat. These results demonstrate the potential for empowering the new generation of wheat cultivars with high-BNI capacity to control nitrification in wheat-production systems.
546			_aText in English
591			_aSpringer
650		7	_96247 _aNitrogen fixation _2AGROVOC
650		7	_911475 _aNutrient use efficiency _2AGROVOC
650		7	_917175 _aNitrosomonas europaea _2AGROVOC
650		7	_91755 _aRoots _2AGROVOC
650		7	_931622 _aExudates _2AGROVOC
650		7	_91296 _aTriticum aestivum _2AGROVOC
700	0		_aBan Tomohiro _920784
700	1		_aMasahiro, K. _94941
700	0		_aIto Osamu _920786
700	1		_aSamejima, H. _920787
700	1		_aWang, H.Y. _920788
700	1		_aPearse, S.J. _920789
700	1		_aGopalakrishnan, S. _920790
700	0		_aKazuhiko Nakahara _92831
700	1		_aZakir Hossain, A.K.M. _920791
700	1		_aHisashi Tsujimoto _97541
700	1		_aBerry, W. _920496
773	0		_tPlant and Soil _n634903 _gv. 299, no. 1-2, p. 55-64 _dDordrecht (Netherlands) : Springer, 2007. _wG444682 _x0032-079X
856	4		_yAccess only for CIMMYT Staff _uhttps://hdl.handle.net/20.500.12665/494
942			_cJA _2ddc _n0
999			_c26860 _d26860