Physiological and Morphological Responses of Hydroponically Grown Pear Rootstock Under Phosphorus Treatment.
Physiological and Morphological Responses of Hydroponically Grown Pear Rootstock Under Phosphorus Treatment.
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磷处理对水培梨砧木生理形态的影响。
DOI：
10.3389/fpls.2021.696045
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发表时间：
2021
影响因子：
5.6
通讯作者：
Wu J
中科院分区：
文献类型：
--
作者：
Chen G;Li Y;Jin C;Wang J;Wang L;Wu J
磷是果树生长发育所必需的大量营养元素，在光合作用、核酸合成、酶活性调节等方面起着重要作用。植物表型的可塑性已在不同的物种在磷缺乏或磷过量的条件下进行了研究。基于这些研究，不同物种的磷水平波动导致不同的响应特征。然而，梨实生苗砧木对磷水平变化的反应却知之甚少。为探讨不同磷水平对梨砧木幼苗生长的影响，采用水培试验，测定和分析了梨砧木幼苗的生长参数、光合速率、根、冠形态特征、宏量和微量营养元素含量等生物学指标。结果表明，无论是磷缺乏还是过量，都对梨实生苗砧木的生长发育产生抑制作用。与正常磷水平（1mM）相比，缺磷（0mM）对黄瓜根系生长、光合速率和酸性磷酸酶（ACP）活性的抑制率分别为44.8%、59.8%和44.4%。另一方面，与正常磷条件（1mM）相比，过量磷条件下，观察到深绿色叶片，根伸长抑制（下降18.8%），光合速率下降（下降25%）。此外，不仅P，而且那些其他矿质营养根浓度的影响，无论是P处理。因此，合理选择磷肥供应量是保证梨实生苗砧木正常生长发育的关键。
Phosphorus (P) is an essential macronutrient for the growth and development of fruit trees, playing an important role in photosynthesis, nucleic acid synthesis, and enzyme activity regulation. The plasticity of plant phenotypic has been investigated in diverse species under conditions of P-deficiency or P-excess. Based on these researches, P level fluctuations in different species result in different characteristics of the response. Nevertheless, little is known about the response of pear seedling rootstock (Pyrus betulifolia Bunge) to the changing of P levels. To explore the effects of different levels of P on the growth of pear seedling rootstock, we performed the hydroponic assays to determine and analyze the biological indexes including growth parameters, photosynthetic rate, root and shoot morphological traits, and concentrations of macro- and micronutrients. The results show that either deficiency or excess of P inhibited the growth and development of pear seedling rootstock. Root growth (down 44.8%), photosynthetic rate (down 59.8%), and acid phosphatase (ACP) activity (down 44.4%) were inhibited under the P-deficiency conditions (0mM), compared with normal P conditions (1mM). On the other hand, dark green leaves, suppression of root elongation (down 18.8%), and photosynthetic rate (down 25%) were observed under regimes of excessive P, compared with normal P conditions (1mM). Furthermore, the root concentration of not only P, but also those of other mineral nutrients were affected by either P treatment. In brief, these results indicated that a careful choice of P fertilizer supply is crucial to ensuring normal growth and development of pear seedling rootstock.
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影响因子：
2.3
作者：
Beebe, SE;Rojas-Pierce, M;Lynch, JP
通讯作者：
Lynch, JP
影响因子：
5.6
作者：
Chen, Guodong;Wang, Li;Tao, Shutian
通讯作者：
Tao, Shutian
影响因子：
4
作者：
Boyce, Richard L.;Larson, Jennifer R.;Sanford, Robert L., Jr.
通讯作者：
Sanford, Robert L., Jr.
影响因子：
3.7
作者：
Chen L;Lin L;Cai G;Sun Y;Huang T;Wang K;Deng J
通讯作者：
Deng J
影响因子：
2.9
作者：
Cimen, Berken
通讯作者：
Cimen, Berken