Table 1.

Identification of groups of MAPK gene families in different plant species.

Plant species	Group A	Group B	Group C	Group D	Total	References
Arabidopsis	3	5	4	8	20	Cçakır and Kılıcçkaya (2015)
Rice	2	1	2	10	15	Reyna and Yang (2006)
Wheat	11	13	22	63	109	Lian et al. (2012)
Maize	7	7	6	19	39	Wang et al. (2010)
Cotton	4	6	5	12	27	Wang et al. (2016)
Poplar	4	4	4	9	21	Zhao et al. (2018)
Tomato	3	4	2	7	16	Kong et al. (2012)
Apple	5	6	5	10	26	Zhang et al. (2013)
Potato	1	4	2	8	15	Zaynab et al. (2021)