With the exception of a possible role in ABA production, the function of carotenoids in amyloplasts remains to be defined. While substantial levels of carotenoids can be found in amyloplasts from some varieties of starchy crops with large genetic variation, such as maize and potato tuber (...
Consistently, these mutations disrupted the function- of LAZY4 in complementing the gravitropic defects of lazy234 mutants (Figure 5K). Together, these data demonstrated that phosphorylation of LAZY4 by the MAPK cascade is important for its function in gravitropism. Phosphorylation of LAZY4 promotes ...
creating a continuous network of matrix grids around the SGs; these grids, with SGs capsuled inside, appeared to function as the basic unit of vitreous endosperm formation. One could imagine that the later-formed vitreous endosperm is composed of numerous interconnecting units like this. In contrast...
Starch granule initiation is poorly understood at the molecular level. The glucosyltransferase, STARCH SYNTHASE 4 (SS4), plays a central role in granule initiation in Arabidopsis leaves, but its function in cereal endosperms is unknown. We investigated the role of SS4 in wheat, which has a ...
The function of amyloplasts in starch storage has already been noted. A second, separate function is in gravisensing (Palmieri and Kiss, 2006). Starch is heavy and starch-filled amyloplasts sediment on a minute time scale, even within plant cells. Amyloplasts in special tissues in the ...
The natural variant, ORHis in melon, or an OR gene mutation in orange curd cauliflower, acquires a new function to trigger chromoplast biogenesis (Chayut et al., 2017; Lu et al., 2006; Tzuri et al., 2015; Yuan et al., 2015). Expression of the OR variants has been shown to ...
Consistently, these mutations disrupted the function- of LAZY4 in complementing the gravitropic defects of lazy234 mutants (Figure 5K). Together, these data demonstrated that phosphorylation of LAZY4 by the MAPK cascade is important for its function in gravitropism. Phosphorylation of LAZY4 promotes ...