The dual symbiosis between arbuscular mycorrhiza and nitrogen fixing bacteria benefits the growth and nutrition of the woody invasive legume Acacia cyclops under nutrient limiting conditions

Mortimer, Peter E.; Roux, M. R. Le; Pérez‐Fernández, María; Benedito, Vagner A.; Kleinert, Aleysia; Xu, Jianchu; Valentine, Alex J.

doi:10.1007/s11104-012-1421-2

Cited by 42 publications

(26 citation statements)

References 43 publications

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“…A suppression of the other root symbiont by a prior colonization of the root system by AM fungi or rhizobia has also been reported by other authors (Catford et al, ; Catford et al, ; Mortimer et al, ; Sakamoto, Ogiwara, & Kaji, ). It is well established that a prior exposure to rhizobia can limit the subsequent formation of root nodules on the root system (Ferguson et al, ; Foo, Heynen, & Reid, ).…”

Section: Discussionsupporting

confidence: 73%

Nutrient demand and fungal access to resources control the carbon allocation to the symbiotic partners in tripartite interactions of Medicago truncatula

Kafle

Garcia

Wang

et al. 2018

Plant Cell & Environment

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Legumes form tripartite interactions with arbuscular mycorrhizal fungi and rhizobia, and both root symbionts exchange nutrients against carbon from their host. The carbon costs of these interactions are substantial, but our current understanding of how the host controls its carbon allocation to individual root symbionts is limited. We examined nutrient uptake and carbon allocation in tripartite interactions of Medicago truncatula under different nutrient supply conditions, and when the fungal partner had access to nitrogen, and followed the gene expression of several plant transporters of the Sucrose Uptake Transporter (SUT) and Sugars Will Eventually be Exported Transporter (SWEET) family. Tripartite interactions led to synergistic growth responses and stimulated the phosphate and nitrogen uptake of the plant. Plant nutrient demand but also fungal access to nutrients played an important role for the carbon transport to different root symbionts, and the plant allocated more carbon to rhizobia under nitrogen demand, but more carbon to the fungal partner when nitrogen was available. These changes in carbon allocation were consistent with changes in the SUT and SWEET expression. Our study provides important insights into how the host plant controls its carbon allocation under different nutrient supply conditions and changes its carbon allocation to different root symbionts to maximize its symbiotic benefits.

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Section: Discussionsupporting

confidence: 73%

Nutrient demand and fungal access to resources control the carbon allocation to the symbiotic partners in tripartite interactions of Medicago truncatula

Kafle

Garcia

Wang

et al. 2018

Plant Cell & Environment

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“…Reduction in the potential to form these functional microbes therefore hinders vegetation restoration (Jasper et al 1989). Many previous studies reported that AM fungi and nitrogen-fixing bacteria had close relationship due to their complementary roles in meeting plant nutritional needs based on the pot experiment (Bauer et al 2012;Mortimer et al 2013). However, few field studies were conducted on the relationship between these two microorganisms.…”

Section: Responsible Editor: Hailong Wangmentioning

confidence: 99%

Effect of vegetation types on soil arbuscular mycorrhizal fungi and nitrogen-fixing bacterial communities in a karst region

Liang

Pan

et al. 2016

Environ Sci Pollut Res

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Arbuscular mycorrhizal (AM) fungi and nitrogen-fixing bacteria play important roles in plant growth and recovery in degraded ecosystems. The desertification in karst regions has become more severe in recent decades. Evaluation of the fungal and bacterial diversity of such regions during vegetation restoration is required for effective protection and restoration in these regions. Therefore, we analyzed relationships among AM fungi and nitrogen-fixing bacteria abundances, plant species diversity, and soil properties in four typical ecosystems of vegetation restoration (tussock (TK), shrub (SB), secondary forest (SF), and primary forest (PF)) in a karst region of southwest China. Abundance of AM fungi and nitrogen-fixing bacteria, plant species diversity, and soil nutrient levels increased from the tussock to the primary forest. The AM fungus, nitrogen-fixing bacterium, and plant community composition differed significantly between vegetation types (p < 0.05). Plant richness and pH were linked to the community composition of fungi and nitrogen-fixing bacteria, respectively. Available phosphorus, total nitrogen, and soil organic carbon levels and plant richness were positively correlated with the abundance of AM fungi and nitrogen-fixing bacteria (p < 0.05). The results suggested that abundance of AM fungi and nitrogen-fixing bacteria increased from the tussock to the primary forest and highlight the essentiality of these communities for vegetation restoration.

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“…Currently, E. fordii has been widely planted in southern China so as to meet the rapidly growing demand for high quality wood or wood products. E. fordii is also a nitrogenfi xing tree species, its roots can be infected by a kind of rhizobium identifi ed as Bradyrhizobium elkanii and can produce nodules (Lu et al 2011, Yao et al 2014, it thus has special ability to improve tree growth and nutrition under nutrient limiting conditions (Mortimer et al 2013), and restore or maintain soil fertility in forest systems (Danso et al 2002, Scheublin et al 2004). Therefore it is also used in establishment of ecological forests for common welfare.…”

Section: Introductionmentioning

confidence: 99%

Diagnosis of macronutrient deficiency in Erythrophleum fordii, a nitrogen-fixing rosewood species

et al. 2014

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Abstract. Erythrophleum fordii (Caesalpiniaceae; nitrogen fixing species) is one of traditional rosewood species indigenous to Southeast Asia and southern China. Slow growth and symptoms such as leaf discoloration, curling and defoliation were usually observed in the nursery and its young plantations due perhaps to deficiencies of specific nutrients. Here sand culture experiment was conducted for its seedlings to assess their visual foliar symptoms, growth performance and nutrient interaction in response to six macronutrient deficiencies. Leaves of E. fordii seedlings discolored in all treatments of nutrient deficiency, and sizes of both old and young leaves became small under nitrogen (N) deficiency, while only young leaves grew small under deficiencies of calcium (Ca) and sulphur (S). Seedling growth was inhibited significantly under deficiencies of N, potassium (K) and phosphorus (P) except that P deficiency increased diameter at root collar. The difference of seedling N concentration between -N and control was normally much smaller than those for other nutrient elements because -N seedling could acquire N by nitrogen fixation of nodules under N deficiency. In spite of this, N was still major limiting factor for plant growth under N deficiency. Besides in P deficiency, P was also the major limiting factor under deficiencies of magnesium (Mg), Ca and S, which indicated that P play an important role in nutrient demand and balance for E. fordii. Antagonism or synergism occurred widely between six macronutrients, especially for P, K and Ca, their concentrations increased or decreased in all six deficiency treatments in comparison with the control. The implications of these findings were also discussed with a case study on nutritional diagnosis for a young plantation of this species.

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The dual symbiosis between arbuscular mycorrhiza and nitrogen fixing bacteria benefits the growth and nutrition of the woody invasive legume Acacia cyclops under nutrient limiting conditions

Cited by 42 publications

References 43 publications

Nutrient demand and fungal access to resources control the carbon allocation to the symbiotic partners in tripartite interactions of Medicago truncatula

Nutrient demand and fungal access to resources control the carbon allocation to the symbiotic partners in tripartite interactions of Medicago truncatula

Effect of vegetation types on soil arbuscular mycorrhizal fungi and nitrogen-fixing bacterial communities in a karst region

Diagnosis of macronutrient deficiency in Erythrophleum fordii, a nitrogen-fixing rosewood species

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