Table 1.

The direct regulatory factors of Chl catabolic genes (CCGs).

Species	Accession numbers	Regulatory factors	Signaling	Phenotypes of mutants	Target CCGs	References
Arabidopsis thaliana	At3g20770	EIN3	Ethylene	Stay-green during leaf senescence	NYC1, NYE1, PAO	Qiu et al., 2015
Arabidopsis thaliana	At5g39610	ORE1	Ethylene	Stay-green during leaf senescence	NYC1, NOL, NYE1, PAO	Qiu et al., 2015
Citrus sinensis	Ciclev10010348m	CitERF13a	Ethylene	NA	CitPPH	Yin et al., 2016
Arabidopsis thaliana	At1g34180	ANAC016	Abscisic acid	Stay-green during leaf senescence	NYE1	Sakuraba et al., 2016
Arabidopsis thaliana	At1g45249/ At4g34000/ At3g19290	ABF2/3/4	Abscisic acid	Stay-green during leaf senescence	NYC1, NYE1, NYE2, PAO	Gao et al., 2016
Arabidopsis thaliana	At3g24650	ABI3	Abscisic acid	Stay-green during seed maturation	NYE1, NYE2	Delmas et al., 2013
Arabidopsis thaliana	At1g16540	ABI5	Abscisic acid	Stay-green during leaf senescence	NYC1, NYE1	Sakuraba et al., 2014
Arabidopsis thaliana	At1g30230	EEL	Abscisic acid	Stay-green during leaf senescence	NYC1, NYE1	Sakuraba et al., 2014
Oryza sativa	Os03g0327800	OsNAPb	Abscisic acid	Accelerated yellowing during leaf senescencec	OsSGR, OsNYC1, OsNYC3, OsRCCR1	Liang et al., 2014
Oryza sativa	Os04g0460600	OsNAC2d	Abscisic acid	NA	OsSGR, OsNYC3	Mao et al., 2017
Arabidopsis thaliana	At1g32640/ At5g46760/ At4g17880	MYC2/3/4e	Jasmonic acid	Stay-green during leaf senescence	NYC1, NYE1, PAO	Zhu et al., 2015
Arabidopsis thaliana	At1g52890/ At3g15500/ At4g27410	ANAC019/055/072f	Jasmonic acid	Stay-green during leaf senescence	NYC1, NYE1, NYE2	Zhu et al., 2015
Arabidopsis thaliana	At2g43010	PIF4	Light	Stay-green during leaf senescence	NYE1	Song et al., 2014
Arabidopsis thaliana	At3g59060	PIF5	Light	Stay-green during leaf senescence	NYE1, NYC1	Zhang et al., 2015
Arabidopsis thaliana	At2g45660	SOC1g	Light	Accelerated yellowing during leaf senescence	NYE1, PPH	Chen et al., 2017

^aTransient over-expression of AtERF17 and SlERF16, which are the homologs of CitERF13 in Arabidopsis and tomato, can lead to Chl degradation in Nicotiana tabacum leaves (Yin et al., 2016).

^bThe null mutant of AtNAP has a significant stay-green phenotype during leaf and silique senescence (Guo and Gan, 2006; Kou et al., 2012).

^cThe prematurely senile 1 (ps1-D) is a gain-of-function mutant of OsNAP (Liang et al., 2014).

^dOsNAC2 is a rice ortholog of ORE1/ANAC092/AtNAC2 (Mao et al., 2017).

^eOver-expression of OsMYC2 significantly promote Chl degradation during leaf senescence in rice (Uji et al., 2017).

^fTransient over-expression of oilseed rape BnaNAC55 (Brassica napus L.) lead to a significant decrease in Chl content in Nicotiana benthamiana leaves (Niu et al., 2016).

^gSOC1 is a negative regulator of Chl degradation during leaf degreening and senescence (Chen et al., 2017).