Amyloplast - Biology Simple
网页2024年3月1日 · The regulation of amyloplast formation is intricately controlled by a network of genes and biochemical pathways that modulate the synthesis and assembly of starch granules within these organelles. Key regulators of amyloplast formation include transcription factors, protein kinases, and enzymes involved in starch biosynthesis .
Amyloplast Definition and Function - ThoughtCo
网页2019年8月19日 · Amyloplasts are plastids that produce and store starch within internal membrane compartments. They are commonly found in vegetative plant tissues, such as tubers (potatoes) and bulbs. Amyloplasts are also thought to be involved in gravity sensing (gravitropism) and helping plant roots grow in a downward direction.
Amyloplast sedimentation repolarizes LAZYs to achieve gravity …
网页2023年9月22日 · Amyloplast sedimentation guides the LAZY proteins to distribute onto the new lower side of the plasma membrane in columella cells, in which relocation of LAZY proteins from the surface of amyloplasts to the adjacent …
Amyloplast - an overview | ScienceDirect Topics
网页Amyloplasts synthesize and accumulate carotenoids mainly as xanthophylls (i.e., lutein, zeaxanthin, and violaxanthin) (Howitt and Pogson, 2006; Wurtzel et al., 2012). With the exception of a possible role in ABA production, the function of carotenoids in amyloplasts remains to be defined.
Principles of amyloplast replication in the ovule integuments of
网页2024年6月3日 · We showed the full sequence of amyloplast development and demonstrated that wild-type amyloplasts adopt three modes of replication, binary fission, multiple fission, and stromule-mediated fission, via multi-way placement of the FtsZ ring.
LAZing around: The intricate dance of amyloplast sedimentation …
网页The starch–statolith hypothesis, proposed in 1900, has played a key role in understanding how plants perceive and respond to gravity (Baldwin et al., 2013). It was hypothesized that amyloplasts filled with starch in gravity-sensing cells act as statoliths, descending within cells to indicate the direction of gravity.
Imaging Amyloplasts in the Developing Endosperm of Barley and …
网页2019年3月6日 · Plants develop amyloplasts in storage organs such as the endosperm and tubers to biosynthesize and store glucose as starch. Starch is produced in the matrix space (stroma) of amyloplasts and forms...
Microrheological Insights into the Dynamics of Amyloplasts in …
网页2015年4月6日 · The most widely accepted starch–statolith hypothesis proposes that the physical sedimentation of amyloplasts (statoliths in plants) in the direction of gravity in gravity-sensing cells, such as root columella cells and shoot endodermal cells, triggers biochemical signals (Morita, 2010).
Amyloplast - an overview | ScienceDirect Topics
网页Small, undifferentiated plastids found in egg (or pollen in certain species), meristematic and embryonic cells, which contribute important biosynthetic functions. May also be present in root nodules of nitrogen-fixing plants, where they function in nitrogen assimilation.
American Journal of Botany - Botanical Society of America
网页2013年1月1日 · A series of genetic studies on shoot gravitropism mutants of Arabidopsis thaliana has revealed that two intracellular components, the vacuolar membrane (VM) and actin microfilaments (AFs), within the shoot statocyte play important roles in …