Mycorrhiza response and phosphorus acquisition efficiency of sorghum cultivars differing in strigolactone composition

被引：13

作者：

Abdelhalim, Tilal ^{[1
,2
]}

Jannoura, Ramia ^{[1
]}

Joergensen, Rainer Georg ^{[1
]}

机构：

[1] Univ Kassel, Soil Biol & Plant Nutr, Nordbahnhofstr 1a, D-37213 Witzenhausen, Germany

[2] Agr Res Corp, White Nile Res Stn, POB 300, Kosti, Sudan

来源：

PLANT AND SOIL | 2019年 / 437卷 / 1-2期

关键词：

Sorghum; Arbuscular mycorrhizal fungi; Strigolactones; Orobanchol; 5-deoxystrigol; P acquisition efficiency; GERMINATION STIMULANTS; MICROBIAL BIOMASS; STRIGA; FUNGI; COLONIZATION; INHIBITION; RESISTANCE; INFECTION; SYMBIOSIS; SIGNALS;

D O I：

10.1007/s11104-019-03960-y

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

AimsThe function of strigolactone isomers in sorghum phosphorus acquisition efficiency (PAE) is still a matter of speculation. Therefore, the objective of this study was to investigate the effects of cultivar-specific strigolactone composition on sorghum growth indices, responsiveness of arbuscular mycorrhizal fungi (AMF), and PAE.MethodsTwo Striga-resistant (orobanchol-producing) and two Striga-susceptible (5-deoxystrigol-producing) sorghum (Sorghum bicolor (L.) Moench) cultivars were planted with and without AMF inoculation as well aswith and without P fertilization. Growth indices and AMF colonization were measured 30 days after sowing from pot trial plants in a growth chamber.ResultsAMF colonization was highest in Tetron and lowest in IS9830, both Striga-resistant cultivars. Conversely, PAE was lowest in Tetron and highest in IS9830 and revealed strong positive relationships with root length, leaf area and shoot DW.ConclusionsAlthough the strigolactone composition had no clear general effects on the growth indices of the four different sorghum cultivars, breeders should consider it for combining efficient AM symbiosis and high PAE values.

引用

页码：55 / 63

页数：9

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