Examination of two lowland rice cultivars reveals that gibberellin-dependent early response to submergence is not necessarily mediated by ethylene

Sammanfattning

Using two lowland rice (Oryza sativa L.) cultivars we found that in both cases submerged-induced elongation early after germination depends on gib-berellins (GAs). Submergence increases the content of the active GA by enhancing the expression of GA biosynthesis genes, thus facilitating the seedlings to escape from the water and preventing asphyxiation. However, the two cultivars differ in their response to ethylene. The cultivar Senia (short), by contrast to cultivar Bomba (tall), does not elongate after ethylene application, and submerged-induced elongation is not negated by an inhibitor of ethylene perception. Also, while ethylene emanation in Senia is not altered by submergence, Bomba seedlings emanate more ethylene upon de-submergence, associated with enhanced expression of the ethylene biosynthesis gene OsACS5. The cultivar Senia thus allows the possibility of clarifying the role of ethylene and other factors as triggers of GA biosynthesis enhancement in rice seedlings under submergence. © 2011 Landes Bioscience.

Nyckelord

Ethylene; Gibberellins; Lowland rice; Oryza sativa; Submergence

Publicerad i

Plant Signaling and Behavior
2011, volym: 6, nummer: 1, sidor: 134-136
Utgivare: Landes Bioscience

SLU författare

• Moritz, Thomas

  • Institutionen för skoglig genetik och växtfysiologi, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Växtbioteknologi

Publikationens identifierare

• DOI: https://doi.org/10.4161/psb.6.1.14268

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/132322