Sains Malaysiana 49(6)(2020): 1245-1272

http://dx.doi.org/10.17576/jsm-2020-4906-04

 

Identification and Analysis of microRNAs Responsive to Abscisic Acid and Methyl Jasmonate Treatments in Persicaria minor

(Pengenalpastian dan Analisis Gerak Balas mikroRNA kepada Rawatan Asid Absisik dan Metil Jasmonat dalam Persicaria minor)

 

ABDUL FATAH A. SAMAD1,2, NAZARUDDIN NAZARUDDIN3, JAEYRES JANI3 & ISMANIZAN ISMAIL1,4*

 

1Institute of Systems Biology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia

 

2Department of Biosciences, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Darul Takzim, Malaysia

 

3Department of Chemistry, Faculty of Mathematics and Natural Sciences, Syiah Kuala University

Darussalam, 23111 Banda Aceh, Indonesia

 

4Centre for Biotechnology and Functional Food, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia

 

Diserahkan: 9 Ogos 2019/Diterima: 14 Februari 2020

 

ABSTRACT

Persicaria minor has been recognised as a plant with high content of volatile organic compounds (VOC) especially terpenoid and green leaf volatile (GLV). Previous finding had showed signaling molecules such as abscisic acid (ABA) and methyl jasmonate (MeJA) can increase the VOC content in plant. In this study, we performed next generation sequencing (NGS) of small RNA to uncover miRNAs roles and their response to both phytohormones (ABA and MeJA) in P. minor. For both ABA and MeJA treated P. minor, small RNA libraries containing 17,253,566 and 40,437,576 reads were generated, respectively. In addition, 18,634,904 reads were generated in plant treated with sterile distilled water which served as control. In these libraries, a total of 88 miRNAs were identified, comprising 41 known and 47 novel miRNAs. It was observed that 21 and 38 miRNAs were significantly regulated in ABA and MeJA libraries, respectively. Four selected miRNAs related to VOC pathways were subjected to RT-qPCR analysis and found to display diverse expression patterns with their targets. This study provides the initial framework for further exploration of miRNA roles in ABA and MeJA responses.

 

Keywords: Abscisic acid; methyl jasmonate; microRNA; Persicaria minor; volatile organic compound

 

ABSTRAK

Persicaria minor telah dikenal pasti sebagai tumbuhan yang mempunyai kandungan sebatian organik meruap (VOC) yang tinggi terutama terpenoid dan sebatian daun hijau meruap (GLV). Kajian lepas menunjukkan molekul pengisyaratan seperti asid absisik (ABA) dan metil jasmonat (MeJA) boleh meningkatkan kandungan VOC dalam tumbuhan. Dalam kajian ini, kami menjalankan penjujukan generasi terkini (NGS) RNA kecil untuk merungkai peranan miRNA dan tindak balasnya terhadap kedua-dua fitohormon (ABA dan MeJA) dalam P. minor. Bagi kedua-dua rawatan ABA dan MeJA terhadap P. minor, perpustakaan kecil RNA masing-masing telah menjana sejumlah 17,253,566 dan 40,437,576 bacaan. Tambahan lagi, sejumlah 18,634,904 bacaan telah dijana daripada tumbuhan terawat air suling steril yang bertindak sebagai kawalan. Dalam perpustakaan tersebut, sejumlah 88 miRNA telah dikenal pasti yang terdiri daripada 41 miRNA yang telah diketahui fungsinya dan 47 miRNA novel. Sejumlah 21 dan 38 miRNA masing-masing telah dicerap dikawal atur secara signifikan dalam perpustakaan ABA dan MeJA. Sebanyak empat miRNA yang berkait dengan tapak jalan VOC telah dikaji melalui analisis RT-qPCR dan didapati menunjukkan corak pengekspresan yang pelbagai terhadap transkrip sasaran masing-masing. Kajian ini menyediakan rangka kerja awal untuk penerokaan selanjutnya mengenai peranan miRNA dalam tindak balas ABA dan MeJA.

 

Kata kunci: Asid absisik; metil jasmonat; mikroRNA; Persicaria minor; sebatian organik meruap

 

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*Pengarang untuk surat-menyurat; email: maniz@ukm.edu.my

 

 

 

 

 

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