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PHENOTYPIC AND PHENOLOGICAL BEHAVIOURS OF CLONES OF NATURAL POPULATIONS OF ATRIPLEX HALIMUS ◆ two population. Marrakech and Idelssen populations did not differ significantly (P < 0.05) in their inflorescence length. In non-irrigated treatment, the length of inflorescence was decreased significantly for the three populations (table 3). Number of inflorescence ramifications Inflorescence ramification number differ significantly between the treatment. In irrigated treatment, the three population presented a hight number of inflorescence ramifications than in non-irrigated treatment. Sidi Bouzid and Marrakech populations presented the highest values (table 3). ecologia mediterranea, tome 29, fascicule 2, 2003, p. 179-188 FRUITING The statistical data showed that the population (origin of the plant material) and the interaction of population by treatment generates a highly significant variability (P < 0.001) for the rate of immature seeds and the rate of infestation (table 4). Treatment generates a highly significant effect of Individuals for the mass of 100 mature seeds. Marrakech and Sidi Bouzid populations have presented the most important rates of immature seeds (table 5) in irrigated treatment. In non-irrigated treatment, the immature seeds decreased significantly in Marrakech population, while they increased significantly in Idelssen population. For the rates of infestation, the F Source of variance df IR IS SW Population 2 68.289*** 295.648*** 2.85 Year 1 0.68 0.572 0.759 Treatment 1 4.02* 0.392 22.27*** Population by year 2 1.125 0.09 0.367 Population by Treatment 2 36.03*** 83.60*** 2.309 Year by treatment 1 4.66* 0.017 0.572 Population by year by Treatment 2 0.18 0.23 0.736 * (P < 0.05); ** (P < 0.01); *** (P < 0.001) Table 5. Mean values and standard error of parameters : infestation rate (IR), immature seeds rate (IS) and dry weight of 100 seeds (SW) of three surveyed populations. Means followed by the same letter are not different significantly at the 0.05 level. Table 4. Analyse of variance (ANOVA) of parameters: infestation (IR), immature seeds (IS) and dry weight of 100 seeds (SW) of individuals of the three surveyed populations. IR (%) IS (%) SW (g) Treatment Irrigation Non irrigated Sidi Bouzid (Safi ) 3.099 ± 2.16b 1.42 ± 0.81b Marrakech 4.64 ± 2.059ab 6.71 ± 4.5a Idelssen (Ouarzazate) 2.017 ± 1.49b 3.58 ± 1.91b Sidi Bouzid (Safi ) 42.67 ± 12.63a 40.28 ± 12.87a Marrakech 38.98 ± 15.42a 23.34 ± 5.84b Idelssen (Ouarzazate) 4.14 ± 1.72c 21.7 ±16.48b Sidi Bouzid (Safi ) 0.092 ± 0.004a 0.069 ± 0.011b Marrakech 0.086 ± 0.018ab 0.066 ± 0.0044b Idelssen (Ouarzazate) 0.097 ± 0.007a 0.069 ± 0.01b 183
184 ◆ A. ABBAD, A. EL-HADRAMI & A. BENCHAABANE Source of variance df H max CW max CW min H max/ CW max Cir IN Population 2 14.19*** 2.13 7.67** 32.18*** 2.07 69.23*** Treatment 1 11.33** 39.67*** 35.67*** 105.79*** 38.06*** 42.87*** Population by treatment 2 14.2*** 13.71*** 7.25** 12.80*** 5.09** 7.61** ** (P
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Tome 29 Fascicule 2, 2003 ISSN 0153
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Rédacteur en chef Managing editor
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Vegetation along an elevation gradi
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V-shaped. The depth of valley reach
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Habitat type C (%) P (%) Second dom
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234 ◆ M. BARBERO — constitution
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236 ◆ M. BARBERO Etage méso-méd
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238 ◆ M. BARBERO L’étage monta
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240 ◆ M. BARBERO Bibliographie Ce
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242 ◆ M. BARBERO CAILLIAU A., 200
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244 ◆ M. BARBERO terranéen dans
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