Possible roles of auxin and zeatin for initiating the dwarfing effect of M9 used as apple rootstock or interstock

• Autorzy: Li H.L. , Zhang H. , Yu C. , Ma L. , Wang Y. , Zhang X. Z. , Han Z. H.
• Języki publikacji: EN

Abstrakty

EN

Endogenous indole-3-acid (IAA) and zeatin (t-Z) may play important roles in the dwarfing mechanisms of rootstocks. The concentrations of IAA and t-Z, as well as the expression of the genes PIN1 and IPT3 were measured in leaves, barks, and roots from nine treatments: M9, Malus X micromalus Makino, Red Fuji/M9/Malus X micromalus, Red Fuji/M9, Red Fuji/Malus X micromalus, M9 rootstock substitution above and below the original graft union, interstock bridging, and interstock bark substitution of M9. The results show that there were greater amounts of t-Z and expressions of IPT3 in invigorated trees (Malus X micromalus and Red Fuji/Malus X micromalus) when compared with dwarfing trees (M9, Red Fuji/M9/Malus X micromalus and Red Fuji/M9) during the period of fast shoot growth (early June to mid-August). Moreover, the variation of IAA contents and PIN1 expressions shared the same pattern with t-Z contents and IPT3 expressions in all the tested locations. IAA content was extremely high in the bark of M9 interstock when compared with that of the scion and the rootstock, yet PIN1 expression in corresponding tissues was very low. After M9 rootstock were substituted above and below the original graft union, contents of t-Z, IAA, and PIN1 expressions in leaves and branch-barks recovered gradually to standard tree levels. However, there is no significant difference between the two treatments. We conclude graft union has no obvious influence on hormone transport. After M9 interstock and its bark were substituted, the hormone measurement of every index was consistent with that of rootstock substitution.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2012
• Tom: 34
• Numer: 1
• Opis fizyczny: p.235-244,fig.,ref.

Twórcy

autor

Li H.L.

• Institute of Horticultural Plants, College of Agronomy and Biotechnology, China Agricultural University, 100193 Beijing, People's Republic of China

autor

Zhang H.

• Institute of Horticultural Plants, College of Agronomy and Biotechnology, China Agricultural University, 100193 Beijing, People's Republic of China

autor

Yu C.

• Institute of Horticultural Plants, College of Agronomy and Biotechnology, China Agricultural University, 100193 Beijing, People's Republic of China

autor

Ma L.

• Institute of Horticultural Plants, College of Agronomy and Biotechnology, China Agricultural University, 100193 Beijing, People's Republic of China

autor

Wang Y.

• Institute of Horticultural Plants, College of Agronomy and Biotechnology, China Agricultural University, 100193 Beijing, People's Republic of China

autor

Zhang X. Z.

• Institute of Horticultural Plants, College of Agronomy and Biotechnology, China Agricultural University, 100193 Beijing, People's Republic of China

autor

Han Z. H.

• Institute of Horticultural Plants, College of Agronomy and Biotechnology, China Agricultural University, 100193 Beijing, People's Republic of China

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