科研之友
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摘要
One of the most important factors for plant growth is to balance the essential nutrients of a plant. The plant growth, root characteristics and element content of rootstock at different levels of boron (B) and calcium (Ca) were studied in hydroponics to evaluate the interactions between B and Ca in trifoliate rootstock [Poncirus trifoliata (L.) Raf.] through systematic analysis. The results showed that the treatments +B-Ca (10 mu M B and 0 mM Ca), -B+Ca (0 mu M B with 1.23 mM Ca), -B-Ca (0 mu M B and 0 mM Ca) severely inhibited the root length, total root surface area (SA) and the proportion of the middle root (mid-root) of the trifoliate rootstock as compared to +B+Ca (10 mu M B with 1.23 mM Ca as CK). The B deficient treatment considerably improved the absorption and utilization of Ca by rootstock. Compared to the control, the biomass of rootstock and B accumulation in -B+Ca or +B-Ca treatments were noticeably decreased. The Fourier-transform infrared analysis (FTIR) analysis demonstrated that Ca promoted B transport to the shoot by the form of B-polyols compounds. It was also observed from the principal component analysis (PCA) that the proportion of the mid-root in the root system might be the main factor for the absorption of the two essential nutrients. In summary, B and Ca absorption exhibited a negative correlation in trifoliate roots.
- 出版日期2019
- 单位华中农业大学
