Skip to main content
出版物 | Publications

Effects of transgenic soybean on growth and phosphorus acquisition in mixed culture system

TitleEffects of transgenic soybean on growth and phosphorus acquisition in mixed culture system
Publication TypeJournal Article
Year of Publication2015
AuthorsXie J, Zhou J, Wang X, Liao H
JournalJournal of Integrative Plant Biology
Volume57
Issue5
Pagination477-485
Date PublishedMay
ISBN Number1672-9072
Accession NumberWOS:000353493600003
Abstract

Transgenic soybean plants overexpressing the Arabidopsis purple acid phosphatase gene AtPAP15 (OXp) or the soybean expansin gene GmEXPB2 (OXe) can improve phosphorous (P) efficiency in pure culture by increasing Apase secretion or changing root morphology. In this study, soybean-soybean mixed cultures were employed to illuminate P acquisition among plants in mixed stands of transgenic and wild-type soybean. Our results showed that transgenic soybean plants were much more competitive, and had greater growth and P uptake than wild-type soybean in mixed culture in both low P calcareous and acid soils. Furthermore, OXe plants had an advantage in calcareous soils when mixed with OXp, whereas the latter performed much better in acid soils. In soybean-maize mixed culture, transgenic soybean had no impact on maize growth compared to controls in both acid and calcareous soils with different P conditions. As for soybean in mixed culture, OXp plants had no significant advantages regardless of P availability or soil type, while P efficiency improved in OXe in calcareous soils compared to controls. These results imply that physiological traits could be easily affected by the mixed maize. Transgenic soybean plants with enhanced root traits had more competitive advantages than those with improved root physiology in mixed culture.

Short TitleEffects of transgenic soybean on growth and phosphorus acquisition in mixed culture system