Table 3.

Compilation of the function associated with type-B response regtulators from different species

Species	Involved in /expression changed upon treatment with
Catharanthus roseus CrRR5	Expression detected64; Not affected by CrHPt1 antisense line13
Lotus japonicas LjRRb1, LjRRb2, LjRRb3, LjRRb4, LjRRb5, LjRRb6, LjRRb7, LjRRb8, LjRRb9, LjRRb10, LjRRb11	Expression detected20
Medicago trunculata MtRR1, MtRR2	Not cytokinin regulated11; MtRR1 is nod-factor dependent11, involved in nodulation11 and in developing seeds67
Oryza sativa OsRR16, OsRR17, OsRR18, OsRR19, OsRR20, OsRR21, OsRR29, OsRR30/EDH1, OsRR33	Not upregulated by cytokinin; expression level not changed by overexpression of OsRR3 and OsRR5 (OsRR16, OsRR17, OsRR18, OsRR20, OsRR21)60; slight regulation of OsRR16 by salt stress, cold stress and dehydration17, expression detected (OsRR16–21)19
Populus trichocarpa PtRR12, PtRR13, PtRR14, PtRR15, PtRR16, PtRR17, PtRR18, PtRR19, PtRR20, PtRR21, PtRR22	PtRR13 overexpressor and RNAi-line did not show any phenotype; constitutively active PtRR13 led to shorter and fewer roots, less adventious roots, callus formation at the cut site, greater tissue growth in absence of cytokinin23,24
Zea maize ZmRR8, ZmRR9, ZmRR10	ZmRR8 localized in the nucleus; Asp67/Asp78 important for ZmRR8/ZmRR9 to be phosphorylated by ZmHP1 and ZmHP2 in vitro; ZmRR8 receiver domain interacted strongly with ZmHP3, ZmRR with ZmHP2 and ZmRR10 with ZmHP141
Vitis vinifera VvRRb1, VvRRb2, VvRRb3, VvRRb4, VvRRb5, VvRRb6	Unaffected by sulfur depletion7