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Inducible overexpression of Ideal Plant Architecture1 improves both yield and disease resistance in rice
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Inducible overexpression of Ideal Plant Architecture1 improves both yield and disease resistance in rice
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Inducible overexpression of Ideal Plant Architecture1 improves both yield and disease resistance in rice
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Journal Article
Inducible overexpression of Ideal Plant Architecture1 improves both yield and disease resistance in rice
2019
Overview
Breeding crops with resistance is an efficient way to control diseases. However, increased resistance often has a fitness penalty. Thus, simultaneously increasing disease resistance and yield potential is a challenge in crop breeding. In this study, we found that downregulation of microRNA-156 (miR-156) and overexpression of
Ideal Plant Architecture1
(
IPA1
) and
OsSPL7
, two target genes of miR-156, enhanced disease resistance against bacterial blight caused by
Xanthomonas oryzae
pv.
oryzae
(
Xoo
), but reduced rice yield. We discovered that gibberellin signalling might be partially responsible for the disease resistance and developmental defects in
IPA1
overexpressors. We then generated transgenic rice plants expressing
IPA1
with the pathogen-inducible promoter of
OsHEN1
; these plants had both enhanced disease resistance and enhanced yield-related traits. Thus, we have identified miR-156–
IPA1
as a novel regulator of the crosstalk between growth and defence, and we have established a new strategy for obtaining both high disease resistance and high yield.
Breeding crops with both high yield and disease resistance remains challenging. A study has now identified microRNA-156–
Ideal Plant Architecture1
(
IPA1
) as a regulator of the crosstalk between growth and defence in rice and overcame the trade-off by pathogen-induced expression of
IPA1
.
