In this issue of Plant Physiology, Weeraratne et al. (2022) measured the levels of APY1 and APY2 transcripts and proteins in different tissues of etiolated seedlings at multiple points after R irradiation. They found that APY protein accumulation generally coincides with the effect of R on growth (Figure 1). Using an anti-APY antibody that detects both APY1 and APY2 (Wu et al., 007), the authors showed that APY protein levels increased gradually in the apical hook and cotyledons starting after 4 h of R treatment, and continuing until the last sampling point (72 h). The dynamics of APY accumulation followed that of R-induced hook opening and cotyledon expansion. The hook opened after 1–12 h of R treatment, while cotyledon area approximately doubled between 24 h and 48 h and continued to increase from 48 h to 72 h after treatment. Interestingly, APY mRNA levels did not increase in response to R, suggesting that R controls APY levels in hooks and cotyledons by increasing translation and/or decreasing protein turnover. The exact mechanism needs further research.
Fernández Milmanda, G. L. (2022).A matter of time : red light regulation of APYRASES shapes seedling growth during de - etiolation.Plant Physiology,189, (3),p.1202-1203
10.1093/plphys/kiac188
Fernández Milmanda, Guadalupe L..2022. "A matter of time : red light regulation of APYRASES shapes seedling growth during de - etiolation".Plant Physiology 189, no.3:1202-1203.
Recuperado de http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2022fernandezmilmanda1