Genetic Improvement of Root Growth Contributes to Efficient Phosphorus Acquisition in maize (Zea mays L.)

Zhang, Yikai; Chen, Fanjun; Chen, Xiao-Chao; Long, Lizhi; Gao, Kun; Yuan, Lixing; Zhang, Fusuo; Mi, Guohua

doi:10.1016/s2095-3119(13)60489-x

Cited by 16 publications

(14 citation statements)

References 50 publications

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“…These results corresponded well with previous studies which showed that the P-efficient plant genotypes demonstrated greater biomass compared to the P-inefficient when grown in low P condition. Some scholars had reported that P-efficient plants of soybean (Zhao et al, 2004), rice ( Oryza sativa L.) (Wissuwa and Ae, 2001; Mori et al, 2016), maize ( Zea mays L.) (Zhang, 2012), and Brassica napus (Zhang et al, 2009) showed significantly biomass ascendancy compared with P-inefficient plants in P shortage conditions.…”

Section: Discussionmentioning

confidence: 99%

Genotypic Differences in Phosphorus Efficiency and the Performance of Physiological Characteristics in Response to Low Phosphorus Stress of Soybean in Southwest of China

Zhou

Ahmed

et al. 2016

Front. Plant Sci.

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Southwest of China is one of the major soybean (Glycine max L.) production regions in China with low availability of soil phosphorus (P). Whereas little information is available on P-efficient soybean genotypes in this region, even though using P-efficient soybean genotypes is a sustainable P management strategy for enhancing yield and P use efficiency. To assess the genetic variation on P use efficiency, 274 soybean genotypes were employed to compare the yields and P acquisition potentials in the field. Additionally, 10 representational genotypes (5 P-efficient genotypes and 5 P-inefficient genotypes) were grown in hydroponic media containing low P treatment (0.05 mM L−1) and high P treatment (0.25 mM L−1) to further investigate P assimilation characteristics and the related mechanisms of P-efficient soybean genotypes. In the field trial, the models described the relationships between yield and seed P concentration (R2 = 0.85), shoot P accumulation (R2 = 0.84), HI (R2 = 0.82) well. The yield, seed P concentration and shoot P accumulation ranged from 5.5 to 36.0 g plant−1, from 0.045 to 0.93% and from 0.065 to 0.278 mg plant−1, respectively. In the hydroponic trial, P-efficient genotypes under low P treatment showed significantly better plant growth, P accumulation and root: shoot ratio than P-inefficient genotypes. Simultaneously, total root length, specific root length, root surface area and root volume of P-efficient were significantly greater than P-inefficient under low P treatment. Higher rate of organic acid exudation and acid phosphatase activities was observed in the P-efficient soybean genotypes under low P condition when compared to the P-inefficient soybean genotypes. It indicated that significant genetic variation for P use efficiency existed in this region, and the P-efficient soybean genotypes, especially E311 and E141, demonstrated great tolerance to P deficiency, which could be potential materials using in improving production and P use efficiency in low availability of soil P region.

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Section: Discussionmentioning

confidence: 99%

Genotypic Differences in Phosphorus Efficiency and the Performance of Physiological Characteristics in Response to Low Phosphorus Stress of Soybean in Southwest of China

Zhou

Ahmed

et al. 2016

Front. Plant Sci.

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“…As a result, photosynthesis and metabolism may be affected. For example, the genetic improvement of root growth contributes to the efficient P acquisition in maize (Zhang et al 2013). Mu et al (2015) found that genetic improvement of root growth increases maize yield via enhanced nitrogen uptake by roots at post-silking stage.…”

Section: Photosynthesis and Biomassmentioning

confidence: 99%

Relationship between root vigour, photosynthesis and biomass in soybean cultivars during 87 years of genetic improvement in the northern China

Cui¹,

Dong²,

Gi³

et al. 2016

Photosynt.

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In the last century, world soybean yield has been constantly enhancing at a remarkable rate. Factors limiting the soybean yield may be multiple. It is widely acknowledged that changes of root metabolism can influence aboveground characteristics, such as the seed yield and photosynthesis. In this study, we considered root bleeding sap mass (BSM) and root activity (RA) as indicators of the root growth vigour. We used 27 soybean cultivars, spanning from 1923 to 2009, to evaluate the contribution of root characteristic improvement to efficient photosynthesis and dry matter production. The BSM, RA, net photosynthetic rate (P N ), and organ biomass were measured at different growth stages, such as the fourth leaf node, flowering, podding, and seed filling stage. Our results showed that the soybean cultivars increased their biomass and P N thanks to genetic improvement. At the same time, BSM and RA also increased in dependence on a year of cultivar release. However, both P N and biomass were positively correlated with root characteristics only at the podding stage. Our data revealed that the improved root characteristic may have contributed to enhanced photosynthesis, biomass, and yield of soybean cultivars during last 87 years of genetic improvement. We suggest that BSM and RA could be used as important indexes for further practice in soybean production improvement.

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“…While L222 does not have these loci, was used as the control. Compared with T222, T149 has a longer root length per plant and is P-efficient when grown in P-deficient calcareous soil [26].…”

Section: Plant Materials and Growth Conditionsmentioning

confidence: 98%

“…Generation of the isogenic maize hybrids T149 and T222 has been described previously [26]. Briefly, a BC 4 F 3 backcross population consisting of 220 lines was developed from the larger-rooted inbred Ye478 (donor parent) and the smaller-rooted inbred Wu312 (recurrent parent).…”

Section: Plant Materials and Growth Conditionsmentioning

confidence: 99%

“…By crossing the NILs with the same tester inbred line, 178, a total of 220 testcrosses were obtained, from which testcrosses T149 and T222 were identified as having different root sizes but similar shoot growth. T149 was more P-efficient than T222 in P-deficient calcareous soil [26]. Using these two maize genotypes with different root sizes, we evaluated the role of maize root growth in P uptake and productivity of maize/faba bean and maize/wheat intercropping systems.…”

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confidence: 99%

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The role of maize root size in phosphorus uptake and productivity of maize/faba bean and maize/wheat intercropping systems

Zhang

Chen

et al. 2012

Sci. China Life Sci.

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Interspecific root/rhizosphere interactions affect phosphorus (P) uptake and the productivity of maize/faba bean and maize/wheat intercropping systems. The aim of these experiments was to determine whether manipulation of maize root growth could improve the productivity of the two intercropping systems. Two near isogenic maize hybrids (the larger-rooted T149 and smaller-rooted T222) were intercropped with faba bean and wheat, under conditions of high-and low-P availability. The larger-rooted T149 showed greater competitive ability than the smaller-rooted T222 in both maize/faba bean and maize/wheat intercropping systems. The higher competitive ability of T149 improved the productivity of the maize/faba bean intercropping system in P-sufficient conditions. In maize/wheat intercropping systems, root growth, shoot biomass, and P uptake of maize were inhibited by wheat, regardless of the P-supply. Compared with T222, the larger-rooted T149 suffered less in the intercropping systems. The total biomass of the maize/wheat intercropping system was higher for wheat/T149 than for wheat/T222 under low-P conditions. These data suggested that genetic improvement of maize root size could enhance maize growth and its ability to compete for P resources in maize/faba bean and maize/wheat intercropping systems. In addition, depending on the P availability, larger maize roots could increase the productivity of intercropping systems. faba bean, intercropping, maize, phosphorus uptake, root growth, wheat Citation:Zhang Y K, Chen F J, Li L, et al. The role of maize root size in phosphorus uptake and productivity of maize/faba bean and maize/wheat intercropping systems.

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Genetic Improvement of Root Growth Contributes to Efficient Phosphorus Acquisition in maize (Zea mays L.)

Cited by 16 publications

References 50 publications

Genotypic Differences in Phosphorus Efficiency and the Performance of Physiological Characteristics in Response to Low Phosphorus Stress of Soybean in Southwest of China

Genotypic Differences in Phosphorus Efficiency and the Performance of Physiological Characteristics in Response to Low Phosphorus Stress of Soybean in Southwest of China

Relationship between root vigour, photosynthesis and biomass in soybean cultivars during 87 years of genetic improvement in the northern China

The role of maize root size in phosphorus uptake and productivity of maize/faba bean and maize/wheat intercropping systems

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