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Research topic: amyloplast

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amyloplast

The Columbia Encyclopedia, Sixth Edition

amyloplast , also called leucoplast, a nonpigmented organelle, or plastid, occurring in the cytoplasm of plant cells. Amyloplasts transform glucose, a simple sugar, into starch through the process of polymerization, and store starch grains within their stretched membranes. Especially large numbers occur in subterranean storage tissues of some plants, such as the common potato. ... Read more

amyloplast
A Dictionary of Plant Sciences

amyloplast A plastid that synthesizes and stores starch , to the exclusion of other activities.

amyloplast
A Dictionary of Biology

amyloplast An organelle in plants that stores starch. Amyloplasts are often found in nonphotosynthetic tissue, such as roots and storage tubers.

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	Identification of the maize amyloplast stromal 112-kD protein as a plastidic starch phosphorylase Magazine article from: Plant Physiology; 1/1/2001; ; 700+ words ; Identification of the Maize Amyloplast Stromal 112-kD Protein as a Plastidic Starch Phosphorylase 12 Amyloplast is the site of starch synthesis in the storage tissue of maize (Zea mays). The amyloplast stroma contains an enriched group of proteins... Read more
	Amyloplast formation and starch granule development in hard red winter wheat Magazine article from: Cereal Chemistry; 3/1/2003; ; 700+ words ; ...to the meristematic region contained amyloplasts that contained a single-size class of...considerable distance through the cytoplasm. Amyloplasts in cells interior to the meristematic...subaleurone and central endosperm cells had amyloplasts that exhibited protrusions at 10-12... Read more
	Auxin and cytokinin have opposite effects on amyloplast development and the expression of starch synthesis genes in cultured bright yellow-2 tobacco cells Magazine article from: Plant Physiology; 10/1/1999; ; 700+ words ; ...and Cytokinin Have Opposite Effects on Amyloplast Development and the Expression of Starch...microscopic observations revealed that this amyloplast formation involves drastic changes in...The effects of auxin and cytokinin on amyloplast development were investigated by adding... Read more
	Curvature induced by amyoplast magnetophoresis in protonemata of the moss Ceratodon purpureus Magazine article from: Plant Physiology; 2/1/1999; ; 700+ words ; ...Hedw.) Brid. protonemata in the dark, amyloplast sedimentation was followed by upward...sedimentation of dense, starch-filled amyloplasts inside specialized cells, so-called...horizontal WT (Fig. 1) and wwr protonemata, amyloplasts sediment in a specific zone located... Read more
	Amyloplasts that sediment in protonemata of the moss Ceratodon purpureus are nonrandomly distributed in microgravity Magazine article from: Plant Physiology; 4/1/2001; ; 700+ words ; Amyloplasts That Sediment in Protonemata of the Moss Ceratodon purpureus...displays a complex plastid zonation in that only some amyloplasts sediment along the length of the tip cell. If gravity is the major force determining the position of amyloplasts that sediment, then these plastids should be ... Read more
	The Maize Phytoene Synthase Gene Family: Overlapping Roles for Carotenogenesis in Endosperm, Photomorphogenesis, and Thermal Stress Tolerance1[C][W][OA] Magazine article from: Plant Physiology; 7/1/2008; ; 700+ words ; ...understood. Maize endosperm carotenoid accumulation requires PSY1 expression. A maize antibody was used to localize PSY1 to amyloplast envelope membranes and to determine PSY1 accumulation in relation to carotenoid accumulation in developing endosperm. To test... Read more
	Nodal endoplasmic reticulum, a specialized form of endoplasmic reticulum found in gravity-sensing root tip columella cells Magazine article from: Plant Physiology; 1/1/2001; ; 700+ words ; ...excludes Golgi stacks, vacuoles, and amyloplasts but not mitochondria. Nodal ER domains...signals produced by the sedimenting amyloplasts, and that the confinement of all ER...to enhance the sedimentability of the amyloplasts in the central region of columella cells... Read more
	In vitro biosynthesis of phosphorylated starch in intact potato amyloplasts Magazine article from: Plant Physiology; 2/1/1999; ; 700+ words ; ...Biosynthesis of Phosphorylated Starch in Intact Potato Amyloplasts1 Intact amyloplasts from potato (Solanum tuberosum L.) were used...best preparations were selected by searching for amyloplasts containing small starch grains. The isolated... Read more
	Salt Modulates Gravity Signaling Pathway to Regulate Growth Direction of Primary Roots in Arabidopsis1[C] Magazine article from: Plant Physiology; 1/1/2008; ; 700+ words ; ...salt stress causes rapid degradation of amyloplasts in root columella cells of Arabidopsis...Mutation of SOS genes also leads to reduced amyloplast degradation in root tip columella cells...root cap, which contain sedimentable amyloplasts, are the gravity-perceptive site in... Read more
	Analysis of the expression of CLA1, a gene that encodes the 1-deoxyxylulose 5-phosphate synthase of the 2-C-methyl-D-erythritol-4-phosphate pathway in Arabidopsis Magazine article from: Plant Physiology; 9/1/2000; ; 700+ words ; ...mutation in the CLAl gene interferes with the normal development of chloroplasts and etioplasts, but does not seem to affect amyloplast structure. Microscopic analysis also shows a pleiotropic effect of the CLA1 gene mutation in mesophyll tissue formation. In... Read more

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