Reference "Differential Responses to UV-B Irradiation of Three Near Isogenic Lines Carrying Different Purple Leaf Genes for Anthocyanin Accumulation in Rice (Oryza sativa L.)"

Reference ID

6993

Title

Differential Responses to UV-B Irradiation of Three Near Isogenic Lines Carrying Different Purple Leaf Genes for Anthocyanin Accumulation in Rice (Oryza sativa L.)

Source

Breeding Science, 2001, vol. 51, pp. 27-32

Authors (4)

Maekawa-M	Sato-T
Kumagai-T	Noda-K

Abstract

We produced near isogenic lines (NILs) for three purple leaf genes, Pl, Plw and
Pli of rice with a genetic back-ground of T-65 to characterize each allele.
Three NILs each had characteristic tissue-specific anthocyanin pigmentation. T-
65 Plw was newly found to make the root purple when the root was exposed to
light. To explore the inducible characteristics of the three genes, we examined
the responses of the three NILs to UV-B irradiation. Although the accumulation
of anthocyanin increased in all NILs with the increase in the intensity of UV-B
irradiation, we observed differential responses for the accumulation of
anthocyanin in the NILs: T-65 Pli accumulated the largest amounts of anthocyanin
under weak and intermediate intensity of UV-B, though this NIL reduced
anthocyanin accumulation under a high intensity of UV-B. T-65 Pl or Plw
increased anthocyanin accumulation with increasing intensity of UV-B.
Anthocyanin accumulation of the Pl NIL was higher than that of the Plw NIL under
each intensity of UV-B. In addition, the total biomass of all the irradiated
NILs decreased with the increasing dose of UV-B irradiation and the decrease was
negatively correlated with the increase in anthocyanin accumulation in the dose
range of UV-B irradiation.