Differential physiological behavior of sugarcane genotypes in response to sparingly soluble phosphorus-sources

文献类型： 外文期刊

第一作者： Zhou, Wenling

作者： Zhou, Wenling;Chen, Diwen;Zeng, Qiaoying;Wu, Qihua;Huang, Ying;Jiang, Yong;Li, Qiwei;Ao, Junhua;Huang, Zhenrui;Tahir, Mukkram Ali

作者机构：

关键词： P efficiency; photosynthesis; root morphology; Saccharum officinarum L; sparingly soluble phosphorus

期刊名称：JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE （ 影响因子：2.426； 五年影响因子：3.029 ）

ISSN： 1436-8730

年卷期： 2021 年 184 卷 2 期

页码：

收录情况： SCI

摘要： Aims: This study was initiated to evaluate different responses of sugarcane (Saccharum officinarum L.) genotypes to sparingly soluble phosphorus (P) treatments and to identify useful plant traits contributing to P efficiency for the selection of efficient and responsive genotypes. Methods: Plant growth, root morphological parameters, photosynthetic parameters, and P efficiency were evaluated under soluble P [KH2PO4 (K-P)] and sparingly soluble P [Ca-3(PO4)(2) (Ca-P), AlPO4 (Al-P), FePO4 center dot 4 H2O (Fe-P), and sodium phytate C6H6O24P6Na12 (Org-P)] treatments using sand cultures. Results: Sugarcane growth was inhibited under sparingly soluble P or low P treatments, by an average of 22.9% or 71.3% reduction in shoot and root biomass, respectively. Al-P and Org-P had higher bioavailability than Fe-P and Ca-P for the tested sugarcane genotypes, which showed lower rate decreases for biomass, root morphological and photosynthetic parameters under Al-P and Org-P treatment than those under Fe-P and Ca-P. In addition, the P content in shoot decreased by an average of 29.2% and 39.2% under Al-P and Org-P treatment, respectively, while 55.7% and 62.9% reduction was detected under Fe-P and Ca-P treatment, respectively, compared with K-P treatment. BC2-32 (hybrid progeny of sugarcane and E. arundinaceus) exhibiting greater P absorption efficiency than other two genotypes under P-starvation treatments; and the root length, root surface areas, root volume, P accumulation, net photosynthetic rate, and shoot and root dry matter of BC2-32 were greater than those of other genotypes under sparingly soluble P forms. Significantly correlations were found between root morphological parameters, photosynthetic parameters and P efficiency under sparingly soluble P and low-P treatment, indicating that stronger root system and less sensitivity of photosynthesis may contribute greatly to activate and take up more P from sparingly soluble P sources. Conclusions: Therefore, BC2-32 would be the ideal material for breeding good varieties and exhibited better growth behavior to P-deficient soils, and root morphological parameters and photosynthetic rate would be the useful plant traits in combination to screen these sugarcane varieties.

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