植物生态学报 ›› 2006, Vol. 30 ›› Issue (6): 947-953.DOI: 10.17521/cjpe.2006.0120
收稿日期:
2005-10-20
接受日期:
2006-01-22
出版日期:
2006-10-20
发布日期:
2006-11-30
通讯作者:
阎秀峰
作者简介:
* E-mail: xfyan@mail.hl.cn基金资助:
Received:
2005-10-20
Accepted:
2006-01-22
Online:
2006-10-20
Published:
2006-11-30
Contact:
YAN Xiu-Feng
摘要:
喜树(Camptotheca acuminata)是我国特有的多年生亚热带落叶阔叶树种,因其次生代谢产物喜树碱具有良好的抗肿瘤活性而受到人们的广泛关注。该文通过温室盆栽接种试验,观察了2属6种丛枝菌根真菌即蜜色无梗囊霉(Acaulospora mellea)、光壁无梗囊霉(A. laevis)、木薯球囊霉(Glomus manihot)、地表球囊霉(G. versiforme)、幼套球囊霉(G. etunicatum)和透光球囊霉(G. diaphanum)对喜树幼苗生长和氮、磷养分吸收的影响。结果表明,丛枝菌根的形成对喜树幼苗的生长以及氮、磷营养的吸收均有影响。从生物量看,除幼套球囊霉和光壁无梗囊霉侵染形成的丛枝菌根喜树幼苗与无菌根幼苗(CK)差异不显著外,其余菌根幼苗的生物量均明显大于无菌根幼苗,透光球囊霉和蜜色无梗囊霉菌根幼苗尤为突出,分别达到无菌根幼苗的1.9和1.4倍。丛枝菌根的形成似乎不利于喜树幼苗的氮素营养吸收,并且主要体现在叶片的氮含量上。相反,丛枝菌根形成总体上促进喜树幼苗对磷素营养的吸收,并且主要体现在根的磷含量上。与无菌根幼苗比,所有菌根幼苗根的氮、磷分配比例增加,而叶片的氮、磷分配比例减少。
赵昕, 阎秀峰. 丛枝菌根对喜树幼苗生长和氮、磷吸收的影响. 植物生态学报, 2006, 30(6): 947-953. DOI: 10.17521/cjpe.2006.0120
ZHAO Xin, YAN Xiu-Feng. EFFECTS OF ARBUSCULAR MYCORRHIZAL FUNGI ON THE GROWTH AND ABSORPTION OF NITROGEN AND PHOSPHORUS IN CAMPTOTHECA ACUMINATA SEEDLINGS. Chinese Journal of Plant Ecology, 2006, 30(6): 947-953. DOI: 10.17521/cjpe.2006.0120
处理 Treatment | 菌根侵染率(%) Mycorrhizal colonization rate | 根系的菌根侵染强度(%) Mycorrhizal colonization intensity of root | 侵染根段的菌根侵染强度(%) Mycorrhizal colonization intensity of infected root fragment | |||||
---|---|---|---|---|---|---|---|---|
CK | 0a | 0a | 0a | |||||
Gm | 83.18±8.75b | 56.22±5.87b | 67.47±6.77b | |||||
Gv | 84.54±9.03b | 53.30±5.37b | 63.96±6.59b | |||||
Ge | 88.54±9.03c | 33.61±3.31c | 40.33±4.03c | |||||
Gd | 74.15±8.12d | 41.36±4.06d | 49.63±5.13d | |||||
Am | 70.54±6.87d | 56.14±4.76b | 55.32±5.71e | |||||
Al | 49.01±5.81e | 26.72±2.34e | 32.04±2.95f |
表1 6种丛枝菌根真菌的侵染情况
Table 1 Colonization status of Camptotheca acuminata inoculated with arbuscular mycorrhizal fungi among six species
处理 Treatment | 菌根侵染率(%) Mycorrhizal colonization rate | 根系的菌根侵染强度(%) Mycorrhizal colonization intensity of root | 侵染根段的菌根侵染强度(%) Mycorrhizal colonization intensity of infected root fragment | |||||
---|---|---|---|---|---|---|---|---|
CK | 0a | 0a | 0a | |||||
Gm | 83.18±8.75b | 56.22±5.87b | 67.47±6.77b | |||||
Gv | 84.54±9.03b | 53.30±5.37b | 63.96±6.59b | |||||
Ge | 88.54±9.03c | 33.61±3.31c | 40.33±4.03c | |||||
Gd | 74.15±8.12d | 41.36±4.06d | 49.63±5.13d | |||||
Am | 70.54±6.87d | 56.14±4.76b | 55.32±5.71e | |||||
Al | 49.01±5.81e | 26.72±2.34e | 32.04±2.95f |
处理 Treatment | 株高(cm) Height | 生物量 Biomass | 根冠比 Root/shoot ratio | |||
---|---|---|---|---|---|---|
根系干重(g·plant-1) Root dry weight | 茎干重(g·plant-1) Stem dry weight | 叶干重(g·plant-1) Leaf dry weight | 全株干重(g·plant-1) Whole plant dry weight | |||
CK | 18.50a | 0.37a | 0.30a | 0.58a | 1.25a | 0.42ab |
Gm | 19.14a | 0.51b | 0.34a | 0.62a | 1.47b | 0.53b |
Gv | 16.80a | 0.64c | 0.29a | 0.57a | 1.50b | 0.75c |
Ge | 19.53a | 0.35a | 0.29a | 0.52a | 1.16a | 0.43ab |
Gd | 20.63a | 0.45b | 0.48b | 0.78b | 1.71c | 0.36a |
Am | 20.13a | 0.88d | 0.56c | 0.96c | 2.40d | 0.58bc |
Al | 18.27a | 0.48b | 0.32a | 0.48a | 1.29ab | 0.60bc |
表2 丛枝菌根对喜树幼苗生长的影响
Table 2 Effects of arbuscular mycorrhiza on the seedling growth of Camptotheca acuminata
处理 Treatment | 株高(cm) Height | 生物量 Biomass | 根冠比 Root/shoot ratio | |||
---|---|---|---|---|---|---|
根系干重(g·plant-1) Root dry weight | 茎干重(g·plant-1) Stem dry weight | 叶干重(g·plant-1) Leaf dry weight | 全株干重(g·plant-1) Whole plant dry weight | |||
CK | 18.50a | 0.37a | 0.30a | 0.58a | 1.25a | 0.42ab |
Gm | 19.14a | 0.51b | 0.34a | 0.62a | 1.47b | 0.53b |
Gv | 16.80a | 0.64c | 0.29a | 0.57a | 1.50b | 0.75c |
Ge | 19.53a | 0.35a | 0.29a | 0.52a | 1.16a | 0.43ab |
Gd | 20.63a | 0.45b | 0.48b | 0.78b | 1.71c | 0.36a |
Am | 20.13a | 0.88d | 0.56c | 0.96c | 2.40d | 0.58bc |
Al | 18.27a | 0.48b | 0.32a | 0.48a | 1.29ab | 0.60bc |
图1 不同丛枝菌根喜树幼苗的氮、磷含量 CK、Gm、Gv、Ge、Gd、Am、Al:见表1 See Table 1 图中具有不同字母的柱体间差异显著(p<0.05) The bars with different letters are significantly different (p<0.05)
Fig.1 N and P contents of Camptotheca acuminata seedlings with different arbuscular mycorrhiza
图2 不同丛枝菌根喜树幼苗中氮、磷的器官分配 CK、Gm、Gv、Ge、Gd、Am、Al:见表1 See Table 1
Fig.2 Allocation of N and P to organs of Camptotheca acuminata seedlings with different arbuscular mycorrhiza
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