Localization of calcium in amyloplasts of root-cap cells using ion microscopy.
نویسندگان
چکیده
An ion microscope has been used to demonstrate that the calcium ion is present in the amyloplasts of root-cap cells of corn, pea, and lettuce. The localization of calcium in the gravity-sensing organelle suggests a possible role of calcium in the gravity-sensing mechanism of plant roots.
منابع مشابه
How roots respond to gravity.
Current knowledge about the mechanisms of plant root response to gravity is reviewed. The roles of the columella region and amyloplasts in the root cap are examined. Results of experiments related to gravistimulation in corn roots with and without root caps are explained. The role of auxin, abscisic acid, and calcium also are examined.
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ورودعنوان ژورنال:
- Science
دوره 216 4551 شماره
صفحات -
تاریخ انتشار 1982