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090			_aB-16678
245	1	0	_aBoron uptake by sunflower, squash and cultured tobacco cells
490	0		_vPhysiologia Plantarum, 91(3), p.435-441, 1994
520	3		_aBoron uptake was studied in sunflower (Helianthus annuus cv. Ha301), squash (Cucurbita pepo cv. Early prolific straight neck)and cultured tobacco (Nicotiana tobacum L. cv. TXD Monsanto cell line)cells with the use of stable B isotopes and inductively coupled plasma mass spectrometry. Boron uptake increased linearly with increasing B concentrations in the uptake medium, did not exhibit multiphasic kinetics and was not saturable over a wide concentration range. The addition of respiratory inhibitors to the uptake solution or exposure to low (2°C)or high (42°C)temperatures did not inhibit B uptake. The majority of the B within the plants, including recently absorbed B, was present in a nonexchangeable form and could not be removed by repeated rinsing with deionized water or exchange with B isotope. These results demonstrate that in these species B uptake is a passive, nonmetabolic process and that the formation of nonexchangeable B-complexes within the cytoplasm and cell wall is a key factor in determining the uptake of B by plants.
650	1	4	_aBORON
650	1	4	_aCUCURBITA PEPO HELIANTHUS ANNUUS
650	1	4	_aINDUCTIVELY COUPLED PLASMA?MASS SPECTROMETRY
650	1	4	_aISOTOPE
650	1	4	_aNICOTIANA TABACUM
650	1	4	_aNUTRITION
650	1	4	_aSQUASH
650	1	4	_aSUNFLOWER
650	1	4	_aTOBACCO
650	1	4	_aUPTAKE
700	1	2	_aBrown, P.H.
700	1	2	_aHu, H.
856	4	0	_uhttps://drive.google.com/file/d/1XRHMPvgWDpAIrXHLYHf0tgaUlNP8MwIM/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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