Effect of phosphate deficiency-induced anthocyanin accumulation on the expression of Solanum lycopersicum GLABRA3 (SlGL3) in tomato
Effect of phosphate deficiency-induced anthocyanin accumulation on the expression of Solanum lycopersicum GLABRA3 (SlGL3) in tomato
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DOI：
10.1080/15592324.2018.1477907
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发表时间：
2018-06
影响因子：
2.9
通讯作者：
R. Tominaga-Wada;A. Masakane;T. Wada
中科院分区：
文献类型：
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作者：
R. Tominaga-Wada;A. Masakane;T. Wada
摘要在拟南芥中，bHLH转录因子GLABRA3（AtGL3）是表皮细胞分化的重要调节因子，积极控制花色素苷的积累。与此相反，我们以前表明，番茄GLABRA3（SLGL3），AtGL3同源物，抑制花青素积累拟南芥。为了阐明花青素苷积累中的这种功能差异，我们分析了花青素苷诱导的番茄中的SlGL3表达模式。在富含花青素的番茄幼苗中，无机磷（Pi）饥饿显著降低了SlGL3的表达。这与先前在拟南芥中获得的结果一致，其中显示SlGL3的过表达抑制花色素苷积累。研究表明，SlGL 3与AtGL 3的功能不同，它可能抑制番茄花色素苷的积累。
ABSTRACT In Arabidopsis thaliana, the bHLH transcription factor, GLABRA3 (AtGL3), is an important regulator of epidermal cell differentiation and positively controls anthocyanin accumulation. In contrast, we previously showed that Solanum lycopersicum GLABRA3 (SlGL3), the AtGL3 homolog, suppressed anthocyanin accumulation in Arabidopsis. To clarify this functional discrepancy in anthocyanin accumulation, we analyzed the SlGL3 expression pattern in anthocyanin-induced tomato. The SlGL3 expression was significantly reduced in tomato seedlings rich in anthocyanin as a result of inorganic phosphate (Pi) starvation. This was consistent with the previous result obtained in Arabidopsis, wherein the overexpression of SlGL3 was shown to inhibit anthocyanin accumulation. Our study suggests that the function of SlGL3 is different from that of AtGL3, and it might inhibit anthocyanin accumulation in tomato.