NDLI: Genomic analysis of allelopathic response to low nitrogen and barnyardgrass competition in rice (Oryza sativa L.)

Content Provider	Springer Nature Link
Author	Fang, Chang Xun He, Hai Bin Wang, Qing Shui Qiu, Long Wang, Hai Bin Zhuang, Yue E Xiong, Jun Lin, Wen Xiong
Copyright Year	2010
Abstract	To explore the molecular mechanism of allelopathic rice in response to low nitrogen (N) supply or accompanying weed stress, allelopathic rice PI 312777 and its counterpart Lemont were grown under low N supply or co-cultured with barnyardgrass [Echinochloa crus-galli (L.) Beauv.] in hydroponics. The suppression subtractive hybridization (SSH) technique was employed to isolate the up-regulated genes in the treated rice accession. The results indicated that the expression of the genes associated with N utilization was significantly up-regulated in allelopathic rice PI 312777, and the higher efficiency of N uptake and its utilization were also detected in PI 312777 than that in Lemont when the two rice accessions were exposed to low N supply. This result suggested that the allelopathic rice had higher ability to adapt to low N stress than its non-allelopathic counterpart. However, a different response was observed when the allelopathic rice was exposed to accompanying weed (barnyardgrass) co-cultured in full Hoagland solution (normal N supply). It showed that the expression of the genes associated with allelochemical synthesis and its detoxification were all up-regulated in the allelopathic rice when co-cultured with the target weed under normal N supply. The results suggested that the allelopathic rice should be a better competitor in the rice-weed co-culture system, which could be attributed to increasing de novo biosynthesis and detoxification of allelochemicals in rice, consequently resulting in enhanced allelopathic effect on the target and preventing the autotoxicity in this process. These findings suggested that the accompanying weed, barnyardgrass is not only the stressful factor, but also one of the triggers in activating allelopathy in rice. This implies that the allelopathic rice is sensible of the existing target in chemical communication.
Starting Page	277
Ending Page	286
Page Count	10
File Format	PDF
ISSN	01676903
Journal	Plant Growth Regulation
Volume Number	61
Issue Number	3
e-ISSN	15735087
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-04-21
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Allelopathy Barnyardgrass Gene expression Low nitrogen Plant defense Rice Agriculture Plant Physiology Plant Anatomy/Development Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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