% 40 % 60 %, VA ( VA Glomus versiforme ( Karsten) Bercli. ( ) Glomus mosseae (Nicol. Et Gerd. ) Gerdemann et Trappe.

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1 2003, 30 (1) : Acta Horticulturae Sinica VA ( 1, ; 2, ) :, VA, 20 % 40 % 60 %, VA ( ),,,, 1 g, % % VA 40 d : VA ; ; ; : S : A : X (2003) VA,,, Graham, 1 VA Glomus versiforme ( Karsten) Bercli. ( ) 2 4, VA, ;,,,,,, VA, VA Glomus mosseae (Nicol. Et Gerd. ) Gerdemann et Trappe. ( ), 0. 1 % 3 min, h, 28, %, mg kg - 1, mg kg - 1, mg kg - 1 ph % 2 h (121 ) 15 cm, 12 cm, 15 cm, 2 kg 1. 2 VA, :,, 20 % 40 % 60 % Glomus mosseae, 6, 5, 30, 60 % 40 d (VA ), : ; : : (397143)

2 % 40 % 60 % Glomus mosseae 6, 5, , 3/ 4, 20 g, 20 g 20 10, (cm) (cm) , : : 00 CI2301PS 8 26,,, UV nm, 1 g VA ( 1),, 60 %, 100 %, 40 % 20 %, Glomus mosseae 2. 2 VA 2 3,,, VA 1 VA Table 1 The percentage of VA mycorrhiza ( VAM) colonization of wild jujube ( Zizyphs spinosus Hu) seedlings with different treatments ( %) content of soil ( %) Experiment Experiment + VAM b b + VAM a ab + VAM a 100 a - VAM VAM VAM : Duncan s, (P 0. 05) Note : Mean difference of treatments identified by Duncan s multiple range test. Means followed by different letters differ significantly at P VA Table 2 The effect of VA mycorrhiza ( VAM) on growth of wild jujube ( Zizyphs spinosus Hu) seedlings under different water content of soil Experiment content of soil ( %) Plant height (cm) (06-18) (07-03) Numbers of leaves (07-07) + VAM b c c c + VAM a b b b + VAM a a a a - VAM c d d c - VAM b c c c - VAM b c c b + VAM a c c b + VAM a b b b + VAM a a a a - VAM b e c cd - VAM b de c d - VAM b cd c cd : Duncan s, (P 0. 05) Leaf area (07-07) (cm 2 ) Note : Mean difference of treatments identified by Duncan s multiple range test. Means followed by different letters differ significantly at P

3 1 : VA 31 VA 20 % VA 60 % 3 VA Table 3 The effect of VAM on biomass of wild jujube ( Zizyphs spinosus Hu) seedlings under different water content of soil (g/ pot) Experiments content of soil ( %) Leaf Shoot Root + VAM c bc c c c c c + VAM b b b b b b b + VAM a a a a a a a - VAM d d d d c d d - VAM c cd c d c c c - VAM c c c c c c c + VAM c c c c c c c + VAM b b b b b b b + VAM a a a a a a a - VAM c c d d c c d Plant - VAM c c d d c c cd - VAM c c d d c c cd : Duncan s, (P 0. 05) Note : Mean difference of treatments identified by Duncan s multiple range test. Means followed by different letters differ significantly at P % 40 % 60 %,, 111 % 162 % 240 % 43 % 165 % 236 %, 20 %,, 40 % 60 % 2. 3 VA 20 % 40 % 60 %, 1 g ( 1), % % %, % % %, VA, 1 VA 1 g Fig. 1 The water requirement to produce 1 g dry matter yield of VAM and non2vam wild jujube ( Zizyphus spinosus Hu) seedings grown in the relative water content of soil 20 %, 40 %, 60 % 2. 4 VA 4,,,, 20 %,,,

4 % 60 %, 20 %,,, Experiments 4 VA Table 4 The effect of VAM on water physiology and photosynthetic rates of wild jujube ( Zizyphs spinosus Hu) seedlings Treatments content of soil ( %) Leaf water saturation deficit ( %) The concentration of proline in leaf ( %) Stomatal conductance (mmol m - 2 s - 1 ) Transpiration rates (mmol m - 2 s - 1 ) Net photosynthetic rates ( mol m - 2 s - 1 ) + VAM b b b b b + VAM b c a a ab + VAM b c a a a - VAM a a b c c - VAM b b b b c - VAM b b b b b + VAM b b bc bc bc + VAM b c b b b + VAM b c a a a - VAM a a c d d - VAM b b c cd cd - VAM b b bc bc bc : Duncan s, (P 0. 05) Note : Mean difference of treatments identified by Duncan s multiple range test. Means followed by different letters differ significantly a P VA, VA 5 8,, Glomus mosseae 90 % 100 %,, 89 %, VA 9 VA 3. 2 VA Glomus mosseae 60 %,, 240 % ; ( 20 %),, 111 %( 40 %) 10 ( 108 %) 6 ( 25 % 47 %) 11VA,, VA 3. 3 VA, 20 % 60 % VA 40 %, VA,,,,,,,

5 1 : VA 33, Glomus mosseae,,,, VA,, ( ),,, VA : 1 Graham J H, Syvertsen J P. Influence of vesicular2arbuscular mycorrhiza on the hydraulic conductivity of roots of two citrus rootstocks. New Phytologist, 1984, (97) : ,. VA., 1988, 5 (1) : VA., 1989, 6 (1) : Liu Runjin. Effects of vesicular2arbuscular mycorrhizas and phosphorus on water status and growth of Malus hupehensis. Journal Plant Nutrition, 1989, 12 (8) : ,,,. VA., 2000, 15 (2) : ,. VAM., 1992, 9 (2) : ,,. (VA)., 1988, 15 (2) : ,,,. VAM., 1998, 24 (6) : ,,,. VA., 1999, 22 (4) : ,.., 1988, 17 (1) : ,,. VA., 1992, 24 (3) : ,. VA., 1997, 20 (4) : Dutra P V, Abad M, Almela V, et al. Auxin interaction with the vesicular2arbuscular mycorrhizal fungus Glomus intraradices Schenck & Smith improves vegetative growth of two citrus rootstocks. Scientia Horticuturae, 1996, 66 : Hartmond U, Schaesberg N V, Graham J H, et al. Salinity and flooding stress effects on mycorrhizal and non2va mycorrhizal citrus rootstock seedlings. Plant and soil, 1987, 104 : Jos Mbarea, Concepci n Azc n2aguliar. mosseae. Applied and Environmental Microbiology, 1982, 43 : Production of plant growth2regulating substances by the vesicular2arbuscular mycorrhizal fungi Glomus 16 Murakami V, Mizukami Y, Yamamoto Y, et al. Analyses of indole acetic acid and abscisic acid contents in nodules of soybean plants bearing VA mycorrhicas. Soil Sci. Plant Nutr., 1991, 37 (2) : Effects of VA Mycorrhizal Fungi Inoculated on Drought Tolerance of Wild Jujube ( Zizyphus spinosus Hu) Seedlings Lu Jinying 1, Mao Yongmin 1, Shen Lianying 1, Peng Shiqi 1, and Li Xiaolin 2 ( 1 Research Center of Chinese Jujube, Hebei Agricultural University, Baoding , China ; 2 College of Resources and Environment, China Agricultural University, Beijing , China) Abstract : Effects of VA mycorrhiza on growth, water status of wild jujube ( Zizyphus spinosus Hu) seedlings grown in pots were studied. As contrasted to the controls, VAM could increase plant growth ( such as plant height, leaf area, fresh and dry mass), enhance leaf relative water content, photosynthetic rates, transpiration rates, stomatal conductance and improve plant drought tolerance significantly when the relative water content of soil was 20 %, 40 %, 60 % respectively. The water consumption of the mycorrhizal plants producing one gram dry matter was from percent to percent less than that of nonmycorrhizal plants under the same soil water content condition. The VAM colonization, the growth of plants, water status of plants had no definitely difference between the water experiment (Water treatments started from sowing) and (Water treatments started from 40 days after sowing). Key words : VA mycorrhiza ; Wild jujube ( Zizyphus spinosus Hu) ; Seedlings ; Drought tolerance