Abstract
Parasitic plants in the Orobanchaceae develop haustoria in response to contact with host roots or chemical haustoriainducing factors. Experiments in this manuscript test the hypothesis that quinolic-inducing factors activate haustorium development via a signal mechanism initiated by redox cycling between quinone and hydroquinone states. Two cDNAs were previously isolated from roots of the parasitic plant Triphysaria versicolor that encode distinct quinone oxidoreductases. QR1 encodes a single-electron reducing NADPH quinone oxidoreductase similar to z-crystallin. The QR2 enzyme catalyzes two electron reductions typical of xenobiotic detoxification. QR1 and QR2 transcripts are upregulated in a primary response to chemical-inducing factors, but only QR1 was upregulated in response to host roots. RNA interference technology was used to reduce QR1 and QR2 transcripts in Triphysaria roots that were evaluated for their ability to form haustoria. There was a significant decrease in haustorium development in roots silenced for QR1 but not in roots silenced for QR2. The infrequent QR1 transgenic roots that did develop haustoria had levels of QR1 similar to those of nontransgenic roots. These experiments implicate QR1 as one of the earliest genes on the haustorium signal transduction pathway, encoding a quinone oxidoreductase necessary for the redox bioactivation of haustorial inducing factors.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1404-1419 |
| Number of pages | 16 |
| Journal | Plant Cell |
| Volume | 22 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 1 2010 |
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ASJC Scopus subject areas
- Plant Science
- Cell Biology
Cite this
A single-electron reducing quinone oxidoreductase is necessary to induce haustorium development in the root parasitic plant Triphysaria. / Bandaranayake, Pradeepa C.G.; Filappova, Tatiana; Tomilov, Alexey; Tomilova, Natalya B.; Jamison-Mcclung, Denneal; Ngo, Quy; Inoue, Kentaro; Yoder, John I.
In: Plant Cell, Vol. 22, No. 4, 01.04.2010, p. 1404-1419.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A single-electron reducing quinone oxidoreductase is necessary to induce haustorium development in the root parasitic plant Triphysaria
AU - Bandaranayake, Pradeepa C.G.
AU - Filappova, Tatiana
AU - Tomilov, Alexey
AU - Tomilova, Natalya B.
AU - Jamison-Mcclung, Denneal
AU - Ngo, Quy
AU - Inoue, Kentaro
AU - Yoder, John I.
PY - 2010/4/1
Y1 - 2010/4/1
N2 - Parasitic plants in the Orobanchaceae develop haustoria in response to contact with host roots or chemical haustoriainducing factors. Experiments in this manuscript test the hypothesis that quinolic-inducing factors activate haustorium development via a signal mechanism initiated by redox cycling between quinone and hydroquinone states. Two cDNAs were previously isolated from roots of the parasitic plant Triphysaria versicolor that encode distinct quinone oxidoreductases. QR1 encodes a single-electron reducing NADPH quinone oxidoreductase similar to z-crystallin. The QR2 enzyme catalyzes two electron reductions typical of xenobiotic detoxification. QR1 and QR2 transcripts are upregulated in a primary response to chemical-inducing factors, but only QR1 was upregulated in response to host roots. RNA interference technology was used to reduce QR1 and QR2 transcripts in Triphysaria roots that were evaluated for their ability to form haustoria. There was a significant decrease in haustorium development in roots silenced for QR1 but not in roots silenced for QR2. The infrequent QR1 transgenic roots that did develop haustoria had levels of QR1 similar to those of nontransgenic roots. These experiments implicate QR1 as one of the earliest genes on the haustorium signal transduction pathway, encoding a quinone oxidoreductase necessary for the redox bioactivation of haustorial inducing factors.
AB - Parasitic plants in the Orobanchaceae develop haustoria in response to contact with host roots or chemical haustoriainducing factors. Experiments in this manuscript test the hypothesis that quinolic-inducing factors activate haustorium development via a signal mechanism initiated by redox cycling between quinone and hydroquinone states. Two cDNAs were previously isolated from roots of the parasitic plant Triphysaria versicolor that encode distinct quinone oxidoreductases. QR1 encodes a single-electron reducing NADPH quinone oxidoreductase similar to z-crystallin. The QR2 enzyme catalyzes two electron reductions typical of xenobiotic detoxification. QR1 and QR2 transcripts are upregulated in a primary response to chemical-inducing factors, but only QR1 was upregulated in response to host roots. RNA interference technology was used to reduce QR1 and QR2 transcripts in Triphysaria roots that were evaluated for their ability to form haustoria. There was a significant decrease in haustorium development in roots silenced for QR1 but not in roots silenced for QR2. The infrequent QR1 transgenic roots that did develop haustoria had levels of QR1 similar to those of nontransgenic roots. These experiments implicate QR1 as one of the earliest genes on the haustorium signal transduction pathway, encoding a quinone oxidoreductase necessary for the redox bioactivation of haustorial inducing factors.
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U2 - 10.1105/tpc.110.074831
DO - 10.1105/tpc.110.074831
M3 - Article
VL - 22
SP - 1404
EP - 1419
JO - Plant Cell
JF - Plant Cell
SN - 1040-4651
IS - 4
ER -