Root Formation in Pea Stem Sections and its Inhibition by Kinetin, Ethionine and Chloramphenicol
- 1 March 1967
- journal article
- research article
- Published by Institute of Experimental Botany in Biologia plantarum
- Vol. 9 (2) , 86-91
- https://doi.org/10.1007/bf02929724
Abstract
Root formation in the etiolated pea stem sections and inhibition of this process is described in the present paper. Sodium fluoride, iodoacetic acid, norvaline, phenylserine, 5-bromuracil and 2-thiouracil did not inhibit the root formation completely. Complete inhibition, however, was observed after treatment of pea stem sections by kinetin, ethionine and chloramphenicol (5 X 10-5 M, 1 x 10-2 M, and 1 x 10-2 16 hours after sectioning). The concentration of kinetin which produced complete inhibition of root formation simultaneously stimulated the growth of the lateral buds. Root formation under the conditions described below can be divided into two stages. The first stage 64 hours from the beginning of the experiment, the second stage 64 hours later. Further, the first stage includes the formation of the meristematic cells in the pericycle areas. In the second stage are included the growth of roots and differentiation of root-tissues. Roots were formed, first of all, in the short vertical region of the sections near to the basal buds. Secondary xylem formation was also observed during the cultivation of the sections. This process was stimulated by kinetin. Byla sledována tvorba kofenů v etiolovanych úsecich hrachovych stonků a jeji inhibice. Fluorid sodny, jodoctová kyselina, norvalin, fenyl-serin, 5-bromuracil a 2-tiouracil neinhibovaly úplnĚ tvorbu kořenů. Uplná inhibice tvorby korenú byla pozorována po aplikaci kinetinu, etioninu a chloramfenikolu (5 x 10-5 M, 1 x 10-2 M, 1 x 10-2 M 16 hod. po odřezánÍ úseků). Koncentrace kinetinu působici üplnou inhibici tvorby kořenú stimulovala růst postrannÍch pupenů. Tvorbu kořenů za uvedenÝch podminek lze rozdĚlit na dvĚ stadia. Prvni - 64 hod. od začátku pokusu, druhé - 64 hod. pozdĚji. V prvnÍm stadiu se tvoři meristematické buńky v pericyklu. Ve druhém stadiu rostou kořeny a probÍhá differenciace kořenového pletiva. Nejprve se tvori koreny v krátkém vertikálnÍm pásmu useku poblÍž basálniho pupene. Při pĚstováni úsekо byla rovnĚž pozorována tvorba druhotného xylému. Tento proces byl stimulován kinetinem. Вработе исследовало сь образование корне йи еуо инуибирование вэтиолированных отрезках стебля уоро ха. Фтористый натрий,й одуксусная кислота, норвалин, фенил-серин, 5-бромурацил и 2-тиоурацил не инуибир овали полностью обр азование корней. Полное подавление корнеобразования при применении кин отина, этионина и хлор-амфеникола (5 х 10-5 м, 1 х 10-2 м, 1 х 10-2 м, 16 часов уюсль взя тия отрезков). Концентрация кинет ина, полностью подав ляющая корнеобразов ание, стимулировала рост боковых почек. Корнеобразование в данных условиях мож но разделить на две с тадии. Первая -64This publication has 14 references indexed in Scilit:
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