Vol.89, No.1, 2020, pp.121-130, doi:10.32604/phyton.2020.07980
OPEN ACCESS
RESEARCH ARTICLE
Optimization of Callus Induction Conditions from Immature Embryos in Maize and Plant Regeneration
  • Peng Jiao1,#, Ruiqi Ma2,#, Zhuo Qi1, Zhenzhong Jiang1, Siyan Liu1, Jing Qu3, Shuyan Guan1,*, Yiyong Ma3,*
1 College of Life Sciences, Jilin Agricultural University, Changchun, 130118, China
2 Northeast Normal University, Environmental School, Changchun, 130118, China
3 College of Agronomy, Jilin Agricultural University, Changchun, 130118, China
# These authors contributed equally to this work
* Corresponding Author: Shuyan Guan. Email: m18404319202_1@163.com; Yiyong Ma. Email: m18404319202_1@126.com
Received 17 July 2019; Accepted 17 October 2019; Issue published 01 March 2020
Abstract
This research uses the immature embryos of inbred maize lines (GSH9901, Hi01, Hi02, and Chang 7-2) as receptor materials to establish the callus induction system. These inbred lines provide the receptor materials for the genetic regeneration of maize and the verification of the genetic functions of maize. The factor experiment and orthogonal experiments were used to investigate the impacts of different genotypes, immature embryo size, shield orientation, 2, 4-D concentration, proline concentration, and folic acid concentration on the induction rate of embryogenic callus tissue. A sensitivity experiment testing glyphosate (Bar) and an antibiotic (Cefotaxime sodium) were also conducted. The results indicate that the immature embryos of inbred maize line GSH9901 were the most effective for callus tissue induction, and the immature embryos with a length of 1.6-2.0 mm produce the best result. The upward shield face is more successful for the formation of induced callus. Using orthogonal analysis, we found that the optimal combination for the induction system was A3 (2,4-D concentration 0.25 mg mL-1 ), B1C3 (proline concentration 0.8 mg mL-1 ), and D2 (folate Concentration 0.5 mg mL-1) and the induction rate reached 84%. We found that cold storage at 4 °C for 1 d is more conducive for the formation of embryogenic callus than the other treatments tested. The sensitivity experiment for callus tissue screening revealed the critical concentration of glyphosate to be 10 mg ml-1 , and the critical concentration of antibiotic is 250 mg ml-1 . Using this combination of glyphosate and antibiotic resulted in regenerated plants. This study established the optimal conditions for immature embryo callus tissue induction in maize.
Keywords
Maize; optimization; genetic regeneration; immature embryos; function verification; regenerated plants
Cite This Article
Jiao, P., Ma, R., Qi, Z., Jiang, Z., Liu, S., et al. (2020). Optimization of Callus Induction Conditions from Immature Embryos in Maize and Plant Regeneration. Phyton-International Journal of Experimental Botany, 89(1), 121–130.