Amyloplast
Definition
A specialized cell organelle, a type of leucoplast, found in plant cells (especially in tubers, roots, stems, and seed endosperm), lacking photosynthetic pigments, and serving the structural role of synthesizing and storing starch granules as a reserve substance. Additionally, certain modified amyloplasts, called statoliths, function as gravity sensors in root cap cells, coordinating plant geotropism.
Bilingual Equivalents
- Amyloplast
- Starch-storing plastid
Grammatical & Source Details
| Inflection Type | Neuter noun, regular plural variations based on standard analytical and biological terminology. |
| Formation | Scientific compound formed from the prefixoid 'amylo-' (starch) and the noun 'plast' (cell organelle), modeled after French terminology. |
| Spelling / Pronunciation | [a.mi.lo.ˈplast] |
| Source | International Review of Cytology and Plant Cell Biology Standards |
Contextual Usage Examples
RO: La microscopul optic, fiecare amiloplast din celula de cartof apare plin cu straturi concentrice de polizaharide.
EN: Under the optical microscope, each amyloplast in the potato cell appears filled with concentric layers of polysaccharides.
RO: În lipsa luminii, un proplastid din țesutul de rezervă se va diferenția rapid într-un amiloplast funcțional.
EN: In the absence of light, a proplastid in the storage tissue will quickly differentiate into a functional amyloplast.
RO: Cercetătorii au demonstrat că un amiloplast greu din vârful rădăcinii se deplasează spre baza celulei sub acțiunea gravitației.
EN: Researchers demonstrated that a heavy amyloplast at the root tip moves toward the bottom of the cell under the influence of gravity.
Idioms & Phrases
Membrană de amiloplast / Amyloplast membrane
RO: Înveliș dublu lipidic ce reglează transportul de glucoză-fosfat necesar sintezei interne a amidonului.
EN: A double lipid envelope that regulates the transport of glucose-phosphate required for internal starch synthesis.
Amiloplast statolit / Statolith amyloplast
RO: Organit celular modificat dens care se sedimentează la baza celulelor vegetale pentru a detecta orientarea spațială.
EN: A dense, modified cell organelle that sedimentates at the bottom of plant cells to detect spatial orientation.
Diferențierea amiloplastelor / Amyloplast differentiation
RO: Procesul biologic de dezvoltare prin care plastidele tinere își asuma funcția structurală de depozitare a carbohidraților.
EN: The biological developmental process through which young plastids assume their structural function of storing carbohydrates.
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