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090			_aB-21543
245	1	0	_aRadicle Growth Regulation of Root Parasitic Plants by Auxin-related Compounds
490	0		_aPlant Cell Physiol 65 (9):1377-1387, 2024
500			_aArtículo
520	3		_aRoot parasitic plants in the Orobanchaceae, such as Striga and Orobanche, cause significant damage to crop production. The germination step of these root parasitic plants is induced by host-root-derived strigolactones. After germination, the radicles elongate toward the host and invade the host root. We have previously discovered that a simple amino acid, tryptophan (Trp), as well as its metabolite, the plant hormone indole-3-acetic acid (IAA), can inhibit radicle elongation of Orobanche minor. These results suggest that auxin plays a crucial role in the radicle elongation step in root parasitic plants. In this report, we used various auxin chemical probes to dissect the auxin function in the radicle growth of O. minor and Striga hermonthica. We found that synthetic auxins inhibited radicle elongation. In addition, auxin receptor antagonist, auxinole, rescued the inhibition of radicle growth by exogenous IAA. Moreover, a polar transport inhibitor of auxin, N-1-naphthylphthalamic acid, affected radicle bending. We also proved that exogenously applied Trp is converted into IAA in O. minor seeds, and auxinole partly rescued this radicle elongation. Taken together, our data demonstrate a pivotal role for auxin in radicle growth. Thus, manipulation of auxin function in root parasitic plants should offer a useful approach to combat these parasites.
650	1	4	_aAUXIN
650	1	4	_aRADICLE
650	1	4	_aROOT PARASITIC PLANT
650	1	4	_aSTRIGOLACTONE
700	1	2	_aTsuzuki, K.
700	1	2	_aSuzuki, T.
700	1	2	_aKuruma, M.
700	1	2	_aNishiyama, K.
700	1	2	_aHayashi, K. I.
700	1	2	_aHagihara, S.
700	1	2	_aSeto, Y.
856	4	0	_uhttps://drive.google.com/file/d/1vd-ktzad5eETKZ5ulgeM9tYTSEmsF6WA/view?usp=drive_link _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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