Long-Distance Movement of Mineral Deficiency-Responsive mRNAs in Nicotiana Benthamiana/Tomato Heterografts

作者:

Chao Xia,Jing Huang,Hai Lan,Cankui Zhang

作者背景:

· Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, China; chaoxia@sicau.edu.cn (C.X.); 13322@sicau.edu.cn (H.L.)

· Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region, Ministry of Agriculture, Chengdu 611130, China

· Department of Agronomy, Purdue University, West Lafayette, IN 47907, USA; huang877@purdue.edu

· Purdue Center for Plant Biology, Purdue University, West Lafayette, IN 47907, USA

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DOI:10.3390/plants9070876

文章关键词:Phloem,Long-distance transport,Mineral deficiency,Mobile mRNA,Heterograft

原文摘要:Deficiencies in essential mineral nutrients such as nitrogen (N), phosphorus (P), and iron (Fe) severely limit plant growth and crop yield. It has been discovered that both the local sensing system in roots and shoot-to-root systemic signaling via the phloem are involved in the regulation of the adaptive alterations in roots, in response to mineral deficiency. mRNAs are one group of molecules with systemic signaling functions in response to intrinsic and environmental cues; however, the importance of shoot-to-root mobile mRNAs stimulated by low mineral levels is not fully understood. In this study, we established a Nicotiana benthamiana/tomato heterograft system to identify shoot-to-root mobile mRNAs that are produced in response to low N, P or Fe. Multiple long-distance mobile mRNAs were identified to be associated with low mineral levels and a few of them may play important roles in hormonal metabolism and root architecture alteration. A comparison of the mobile mRNAs from our study with those identified from previous studies showed that very few transcripts are conserved among different species.