Table 2.

Summary of databases depositing plant lncRNAs

Name	Main features	Link	Refs.
TAIR	The Arabidopsis Information Resource; serves as a comprehensive data repository; multiple analysis tools available	https://www.arabidopsis.org/	[121]
PlantNATsDB	Plant NATs database; contains NATs of 70 plant species; provides prediction of NATs; deposits networks formed by NATs; GO annotation and gene set analysis available	http://bis.zju.edu.cn/pnatdb/	[122]
lncRNAdb	A reference database for lncRNAs; deposits all known functional lncRNAs and manual annotation information of lncRNAs; sequence analysis tools available	http://www.lncrnadb.org/	[123,124]
NONCODE	An integrated knowledge database of ncRNAs; deposits all kinds of ncRNAs except tRNAs and rRNAs; all sequences information were confirmed manually; provides expression profile of lncRNA genes by graphs; provides an ID conversion tool from RefSeq or Ensembl ID to NONCODE ID and a service of lncRNA identification	http://www.noncode.org/	[125,126]
PLncDB	A plant lncRNA database; currently just contains Arabidopsis lncRNAs; provides genome browser of lncRNAs	http://chualab.rockefeller.edu/gbrowse2/homepage.html	[8]
PNRD	A plant ncRNA database; aims to provide information of both sRNAs and lncRNAs for 150 species; multiple analysis tools available	http://structuralbiology.cau.edu.cn/PNRD/	[127]

Note: TAIR, The Arabidopsis Information Resource; PlantNATsDB, Plant Natural Antisense Transcripts DataBase; lncRNAdb, A reference database for lncRNAs; NONCODE, An integrated knowledge database of ncRNAs; PLncDB, A plant lncRNA database; PNRD, A plant ncRNA database.