Screening soybean for aluminium tolerance and adaptation to acid soils

Author(s):  
W. J. Horst ◽  
F. Klotz
Author(s):  
Claudia Teixeira Guimaraes ◽  
Jurandir Vieira de Magalhaes

Abstract Citrate transporters belonging to the multidrug and toxic compound extrusion (MATE) family of membrane transporters in sorghum and maize, SbMATE and ZmMATE1, respectively, play a major role in aluminium (Al) tolerance. However, these MATE members show regulatory differences, as well as peculiarities in their genetic effect and mode of action. These aspects, which are discussed in this chapter, have to be considered to design successful breeding programmes in order to achieve maximum Al tolerance and, consequently, to improve grain and biomass production in regions of the world with Al toxicity. As shown in this chapter, target genes with major effects and molecular tools are available for marker-assisted breeding for improving Al tolerance both in sorghum and maize. However, wide adaptation to acid soils should be sought by pyramiding genes controlling different traits such as drought tolerance, P acquisition, resistance to diseases and other stresses commonly found in each agroecological environment.


2009 ◽  
Vol 103 (8) ◽  
pp. 1239-1247 ◽  
Author(s):  
Yu-Mei Du ◽  
Jiang Tian ◽  
Hong Liao ◽  
Chang-Jun Bai ◽  
Xiao-Long Yan ◽  
...  

2006 ◽  
Vol 57 (1) ◽  
pp. 113 ◽  
Author(s):  
Junping Wang ◽  
Harsh Raman ◽  
Barbara Read ◽  
Meixue Zhou ◽  
Neville Mendham ◽  
...  

Aluminium (Al) phytotoxicity is one of the major constraints for barley (Hordeum vulgare L.) production on acid soils. Genetic variation for Al tolerance is present in barley germplasm. Previous studies have shown that Al tolerance in cv. Dayton and WB229 is controlled by a single locus on 4H. The present study was conducted to investigate the genetic control of Al tolerance in Japanese barley cv. Honen, and validate the linkage relationship between the Al tolerance locus and the molecular markers established previously. An F3 progeny representing 94 F2s from the cross of F6ant28B48-16 (Al sensitive) × Honen (Al tolerant) was evaluated for Al tolerance by staining roots with eriochrome cyanine R. A single Al tolerance locus Alt was validated on the long arm of chromosome 4H in Honen. Single sequence repeat (SSR) markers Bmag353 and HVM68 flanked the Alt locus at a distance of 1.6 ± 0.9 and 5.1 ± 1.7 cM, respectively. Our results have shown that the linkage between SSR markers and the Al tolerance locus can be used to characterise the ‘unknown source’ for Al tolerance.


2011 ◽  
Vol 62 (5) ◽  
pp. 413 ◽  
Author(s):  
R. A. Culvenor ◽  
S. E. McDonald ◽  
P. E. Veness ◽  
D. Watson ◽  
W. Dempsey

We examined the hypothesis that the higher aluminium (Al) tolerance of recent cultivars of the perennial grass, phalaris (Phalaris aquatica L.), improved establishment on strongly acid soils and that expression of this tolerance depended on seasonal rainfall conditions. Establishment under a range of conditions by a new cultivar (Advanced AT) with the highest Al tolerance yet achieved was compared with another relatively tolerant cultivar (Landmaster) and less tolerant cultivars and some alternative species on strongly acidic soils by sowing twice per year at six sites over 3 years (2004–06). Seedlings were considered established if they survived the first summer as shown by frequency and yield in the year after sowing. Low autumn rainfall in all years hindered weed control and delayed sowing. Under adequate rainfall in 2004 and 2005 sowings, Advanced AT and Landmaster established similarly and were denser and more productive, on average, than Holdfast and Sirosa, which in turn were higher than Australian II, an order related to Al tolerance measured in solution. Persistence in later years was ranked similarly. Under very adverse spring drought conditions in 2006, Advanced AT established better than Landmaster at the most acidic sites as hypothesised. Soil pH of sites where Advanced AT established better than Landmaster in 2006–07 was <4.2 in CaCl2. The results suggested that current recommendations on the tolerance of phalaris to acid soils are too conservative and that phalaris is more suitable for acid soils in southern Australia than these recommendations indicate.


1928 ◽  
Vol 11 (2) ◽  
pp. 150-152
Author(s):  
E T Wherry
Keyword(s):  

1977 ◽  
Vol 57 (2) ◽  
pp. 197-203 ◽  
Author(s):  
W. A. RICE ◽  
D. C. PENNEY ◽  
M. NYBORG

The effects of soil acidity on nitrogen fixation by alfalfa (Medicago sativa L.) and red clover (Trifolium pratense L.) were investigated in field experiments at 28 locations, and in greenhouse experiments using soils from these locations. The pH of the soils (limed and unlimed) varied from 4.5 to 7.2. Rhizobia populations in the soil, nodulation, and relative forage yields (yield without N/yield with N) were measured in both the field and greenhouse experiments. Rhizobium meliloti numbers, nodulation scores, and relative yields of alfalfa decreased sharply as the pH of the soils decreased below 6.0. For soils with pH 6.0 or greater, there was very little effect of pH on any of the above factors for alfalfa. Soil pH in the range studied had no effect on nodulation scores and relative yields of red clover. However, R. trifolii numbers were reduced when the pH of the soil was less than 4.9. These results demonstrate that hydrogen ion concentration is an important factor limiting alfalfa growth on acid soils of Alberta and northeastern British Columbia, but it is less important for red clover. This supports the continued use of measurements of soil pH, as well as plant-available Al and Mn for predicting crop response to lime.


1994 ◽  
Vol 45 (3) ◽  
pp. 613 ◽  
Author(s):  
JM Carter ◽  
WK Gardner ◽  
AH Gibson

The response of faba beans (Vicia faba L. cv. Fiord) to seed inoculation with eight strains of Rhizobium leguminosarum biovar. viciae was examined in field experiments at six sites on acid soils in south-west Victoria. At two of the sites, two additional strains were examined, and in 1988, 14 strains were examined at one site. Very low natural populations of R. leguminosarum bv. viciae were found at the experimental sites. Most strains resulted in improved early nodulation and increased grain yield at all sites, when compared to inoculation with the commercial strain of rhizobia (SU391). Plant dry matter production and nitrogen accumulation in the plant shoot tissue was also increased at one site during the flowering period by some strains. Large visual differences between plots inoculated with SU391 and other strains were evident at most sites. Most uninoculated treatments were not nodulated and yielded very poorly. Treatments inoculated with the strain SU391 performed similarly to the uninoculated treatments.


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