Record ID No. |
2228 |
Author(s) |
Carretero C. L., Cantos M., Garcia J. L., Azcon R., Troncoso A. , 2009 |
Affiliation |
CSIC, Inst Recursos Nat & Agrobiol, POB 1052, E-41080 Seville, SPAIN |
Title |
Growth Responses of Micropropagated Cassava Clones as Affected by Glomus Intraradices Colonization |
Source. Vol.(no):Page |
Journal of Plant Nutrition. 32(2): 261-273p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Biochemistry |
Sub-subjects |
Miscellaneous |
Country |
Spain, Europe |
Abstracts |
This study reports the effectiveness of an arbuscular mycorrhizal (AM) fungus Glomus intraradices on three clones (SOM-1, 05 and 50) of cassava (Manihot esculenta). Arbuscular mycorrhizal
inoculation increased plant resistance to transplant stress from in vitro to ex vitro conditions and plant
biomass (shoot and root) production was greatly enhanced by AM-colonization. The magnitude of AM growth
stimulation over control clones was: 861% (SOM-1), 1042% (05) and 854% (50). Arbuscular mycorrhizal colonized
cassava plants increased cassava water uptake in terms of percentage, 62% in clone SOM-1, 24% in clone 05, and
157% in clone 50. The highest effect of AM-colonization on water content in root of clone 50 was correlated
with the greatest increment in leaf tissue production (1218% over control) and with the maximum shoot/root
ratio determined. The biomass distribution between shoot and root was changed by AM symbiosis and such effect
varied for each clone that may be caused by mycorrhizal changes in macro/micro-nutrients
translocation/compartimentation. Cassava dependence on AM symbiosis was greatest in clone SOM-1 since
AM-colonization provided the highest stem (weight, length, and diameters), leaf (weight and number), bud
number, and root weight. These results lead to practical applications because AM inoculation is crucial for
improving cassava yield (shoot and root) and nutrition irrespective of the clone involved. Thus, importance of
AM symbiosis in micropropagated cassava clones is of great practical interest in agriculture and allows the
selection of the most suitable clone for dry environments due to the particular effect on root water content
that improves drought adaptation. |