Assertion: chloroplast | /r/CapableOf | signal event
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Source sentences:
text: (a) Early chloroplast biogenesis failure triggers one or more retrograde (chloroplast-to-nucleus) signalling events (generation of a negative signal or loss of a positive signal) which results in reduced expression of PhANGs and their regulators and of specific sigma factor genes in the nucleus, while also promoting the expression of NEPs and actively maintaining the replication state of the cpDNA; together these processes amount to an anterograde (nucleus-to-chloroplast) compensatory response to the original cue8-triggered retrograde signal.