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. 2020 Feb 26;21(5):1600. doi: 10.3390/ijms21051600

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Metabolic pathways involved in self-incompatibility of Camellia oleifera. (A) Expression levels of each transcript in self-, cross- and non-pollinated pistils and mature pollen were shown by heatmap using log10(FPKM). FPKM = fragments per kilobase per million mapped fragments. The dotted line represents plant hormone signal transduction, the yellow background represents the plant MAPK signaling pathway and the blue background represents the ubiquitin-mediated proteolysis. The rectangles marked with green frames represent transcripts with significant differences in SP48_VS_CP48 or SP72_VS_CP72 by Duncan’s test. SP48/72, self-pollinated pistils at 48 h/72 h; CP48/72, cross-pollinated pistils at 48 h/72 h; NP48/72, non-pollinated pistils at 48 h/72 h and Pn, mature pollen. COI1: coronatine insensitive 1 (COI1.1: cb10019_c10797/f1p1/2331, COI1.2: cb10019_c12051/f3p2/2439, COI1.3: cb10019_c213631/f7p3/2189 and COI1.4: cb10019_c24162/f1p1/2313); JAZ: jasmonate ZIM-domain protein (JAZ10.1: cb10082_c1/f6p0/1155, JAZ10.2: cb10082_c9/f1p0/2636, JAZ2: cb15491_c52/f1p1/1212, JAZ3.1: cb15491_c53/f1p0/995 and JAZ3.2: cb15491_c77/f2p0/1218); ETR: ethylene receptor (ETR2.1: cb17705_c11/f2p0/917, ETR2.2: cb17705_c23/f1p0/3523, ETR2.3: cb17705_c46/f1p0/2261, ETR2.4: cb17705_c49/f1p1/3042, ETR2.5: cb17705_c50/f1p0/3281, ETR3: cb2257_c41/f1p0/1264, ETR4: cb2257_c48/f1p0/5354, ETR1.1: cb2257_c52/f6p0/3288 and ETR1.2: cb5372_c7/f2p0/2692); CTR1: serine/threonine-protein kinase 1 (CTR1: cb13260_c20799/f1p0/1502); EIN2:ethylene-insensitive protein 2 (EIN2: cb18338_c4/f1p0/1901); EIN3: EIN3-like protein (EIN3.4: cb16581_c3/f1p0/1238, EIN3.1.1: cb3510_c25/f3p0/1874, EIN3.2: cb3510_c34/f1p0/2313, EIN3.1.2: cb3510_c58/f2p0/1728 and EIN3.1.3: cb3510_c60/f1p1/1582); XRN4: 5′-3′ exoribonuclease 4 (XRN4: cb10019_c84410/f1p0/2840); EBF1/2: EIN3-binding F-box protein (EBF1/2.1: cb2074_c31/f2p0/2581 and EBF1/2.2: cb2074_c97/f4p3/2739); SIAH1: E3 ubiquitin-protein ligase SIAH1 (SIAH1: cb3579_c35/f1p0/1059); RCHY1: RING finger and CHY zinc finger domain-containing protein 1 (RCHY1.1: cb10019_c30957/f9p2/3704, RCHY1.2: cb10019_c40423/f1p0/2236, RCHY1.3: cb10019_c49228/f3p1/2088, RCHY1.4: cb10019_c49752/f1p0/2425 and RCHY1.5: cb15316_c3/f2p0/1121) and TRIP12: E3 ubiquitin-protein ligase UPL4 (TRIP12.1: cb10019_c108175/f3p0/2352, TRIP12.2: cb10019_c2620/f4p1/3672, TRIP12.3: cb10019_c2623/f1p0/2608, TRIP12.4: cb16096_c25/f4p0/1881, TRIP12.5: cb16096_c9/f1p0/1267 and TRIP12.7: cb19931_c8/f2p0/2614). The numbers behind the transcript name represent the transcript ID in the transcriptome. (B) Expression levels of JAZ2, EIN2, XRN4, SIAH1, RCHY1.4 and TRIP12.2 based on FPKM and qRT-PCR data. SP48 sample was the reference to calculate the relative expression data. Error bars indicate SD. Different letters represent significant difference at mRNA levels (p < 0.05).