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פותח על ידי קלירמאש פתרונות בע"מ -
Lateral root formation in pine seedlings - II. The role of assimilates
Year:
1994
Source of publication :
trees (source)
Authors :
עצמון, ניר
;
.
ראובני, עודד
;
.
Volume :
8
Co-Authors:
Atzmon, N., Department of Horticulture, Faculty of Agriculture, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot, 76100, Israel
Reuveni, O., Institute of Horticulture, The Volcani Center, P. O. Box 6, Bet-Dagan, 50250, Israel
Riov, J., Department of Horticulture, Faculty of Agriculture, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot, 76100, Israel
Facilitators :
From page:
273
To page:
277
(
Total pages:
5
)
Abstract:
The role of assimilates in lateral root development was studied in Pinus pinea seedlings grown in a nutrient solution. Seedlings were treated with 14CO2 for 2 h following removal of the tap root tip at various times prior to the application of 14CO2 or removal of a different number of cotyledons at one time. In seedlings with intact root systems most of the radioactivity accumulated in the lower section of the root containing the tap root apex. When the tap root tip was removed, the pattern of radioactivity accumulation along the root was affected by the presence and the stage of lateral root development. Removing the tap root tip of young seedlings (with no lateral roots) resulted in an almost equal distribution of radioactivity along the root. About 50% of the total radioactivity was found in the section showing the highest lateral root growth. Removing the tap root tip of mature seedlings (with lateral roots in the upper section) resulted in an immediate increase in the radioactivity accumulation in the upper section. When lateral roots appeared in the middle section, the pattern of radioactivity distribution was similar to that found in root decapitated young seedlings. Removal of cotyledons of mature seedlings somewhat increased the transport of radioactivity to the lower root section at the expense of the radioactivity in the lateral roots of the upper section. The present study suggests that competition within the root system between the tap root apex and the lateral roots may play an important role in determining the morphology of the root system. © 1994 Springer-Verlag.
Note:
Related Files :
Assimilates
Lateral roots
Pinus pinea
עוד תגיות
תוכן קשור
More details
DOI :
10.1007/BF00202670
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
20864
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:39
Scientific Publication
Lateral root formation in pine seedlings - II. The role of assimilates
8
Atzmon, N., Department of Horticulture, Faculty of Agriculture, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot, 76100, Israel
Reuveni, O., Institute of Horticulture, The Volcani Center, P. O. Box 6, Bet-Dagan, 50250, Israel
Riov, J., Department of Horticulture, Faculty of Agriculture, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot, 76100, Israel
Lateral root formation in pine seedlings - II. The role of assimilates
The role of assimilates in lateral root development was studied in Pinus pinea seedlings grown in a nutrient solution. Seedlings were treated with 14CO2 for 2 h following removal of the tap root tip at various times prior to the application of 14CO2 or removal of a different number of cotyledons at one time. In seedlings with intact root systems most of the radioactivity accumulated in the lower section of the root containing the tap root apex. When the tap root tip was removed, the pattern of radioactivity accumulation along the root was affected by the presence and the stage of lateral root development. Removing the tap root tip of young seedlings (with no lateral roots) resulted in an almost equal distribution of radioactivity along the root. About 50% of the total radioactivity was found in the section showing the highest lateral root growth. Removing the tap root tip of mature seedlings (with lateral roots in the upper section) resulted in an immediate increase in the radioactivity accumulation in the upper section. When lateral roots appeared in the middle section, the pattern of radioactivity distribution was similar to that found in root decapitated young seedlings. Removal of cotyledons of mature seedlings somewhat increased the transport of radioactivity to the lower root section at the expense of the radioactivity in the lateral roots of the upper section. The present study suggests that competition within the root system between the tap root apex and the lateral roots may play an important role in determining the morphology of the root system. © 1994 Springer-Verlag.
Scientific Publication
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