Environmental Science and Pollution Research

, Volume 26, Issue 14, pp 13717–13724 | Cite as

Differences of Cd uptake and expression of OAS and IRT genes in two varieties of ryegrasses

  • Sunlin Chi
  • Yuli Qin
  • Weihong XuEmail author
  • Yourong ChaiEmail author
  • Deyu Feng
  • Yanhua Li
  • Tao Li
  • Mei Yang
  • Zhangmi He
Sustainable Environmental Management


Pot experiment was conducted to study the difference of cadmium uptake and OAS and IRT genes’ expression between the two ryegrass varieties under cadmium stress. The results showed that with the increase of cadmium levels, the dry weights of roots of the two ryegrass varieties, and the dry weights of shoots and plants of Abbott first increased and then decreased. When exposed to 75 mg kg−1 Cd, the dry weights of shoot and plant of Abbott reached the maximum, which increased by 11.13 and 10.67% compared with the control. At 75 mg kg−1 Cd, cadmium concentrations in shoot of the two ryegrass varieties were higher than the critical value of Cd hyperaccumulator (100 mg kg−1), 111.19 mg kg−1 (Bond), and 133.69 mg kg−1 (Abbott), respectively. The OAS gene expression in the leaves of the two ryegrass varieties showed a unimodal curve, which was up to the highest at the cadmium level of 150 mg kg−1, but fell back at high cadmium levels of 300 and 600 mg kg−1. The OAS gene expression in Bond and Abbott roots showed a bimodal curve. The OAS gene expression in Bond root and Abbott stem mainly showed a unimodal curve. The expression of IRT genes family in the leaves of ryegrass varieties was basically in line with the characteristics of unimodal curve, which was up to the highest at cadmium level of 75 or 150 mg kg−1, respectively. The IRT expression in the ryegrass stems showed characteristics of bimodal and unimodal curves, while that in the roots was mainly unimodal. The expression of OAS and IRT genes was higher in Bond than that in Abbott due to genotype difference between the two varieties. The expression of OAS and IRT was greater in leaves than that in roots and stems. Ryegrass tolerance to cadmium can be increased by increasing the expression of OAS and IRT genes in roots and stems, and transfer of cadmium from roots and stems to the leaves can be enhanced by increasing expression OAS and IRT in leaves.


Soil cadmium pollution Ryegrass varieties Cadmium uptake OAS IRT 


Funding information

This work was supported by Fund of China Agriculture Research System (CARS-23), and the National Science and Technology Pillar Program of China (No. 2007BAD87B10).


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Sunlin Chi
    • 1
  • Yuli Qin
    • 1
  • Weihong Xu
    • 1
    Email author
  • Yourong Chai
    • 2
    Email author
  • Deyu Feng
    • 1
  • Yanhua Li
    • 1
  • Tao Li
    • 1
  • Mei Yang
    • 1
  • Zhangmi He
    • 1
  1. 1.College of Resources and Environmental SciencesSouthwest UniversityChongqingPeople’s Republic of China
  2. 2.College of Agronomy and BiotechnologySouthwest UniversityChongqingPeople’s Republic of China

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