Response of Photosynthetic Characteristics of Walnut Seedlings to High Phosphorus Stress

doi:10.6048/j.issn.1001-4330.2021.02.007

Xinjiang Agricultural Sciences ›› 2021, Vol. 58 ›› Issue (2): 254-264.DOI: 10.6048/j.issn.1001-4330.2021.02.007

• Physiology and Biochemistry·Horticultural Special Local Products·Soil FertilizetoStorage and Preservation Processing·Facility Agriculture • Previous Articles Next Articles

Response of Photosynthetic Characteristics of Walnut Seedlings to High Phosphorus Stress

LIU Chunhua¹, ZHANG Rui¹,XIE Fu²,WANG Yang¹,HU Kaihong¹,WANG Jianjian¹ SONG Yan¹,ZHAO Zhenkun¹,ZHANG Jianliang³

1. Key laboratory for Conservation and Utilization of Biological Resources in Tarim Basin, Xinjiang Production and Construction Corps, /College of Plant Science, Tarim University, /National and Local Joint Engineering Laboratory of High Efficiency and High Quality Cultivation and Deep Processing Technology of Characteristic Fruit Trees in Southern Xinjiang, Alar Xinjiang 843300, China;
2.Aksu College of Education, Aksu Xinjiang 843000, China;
3.Agricultural Development Service Center of the Third Regiment of Alar City, the First Division of Xinjiang Production and Construction Corps, Alar Xinjiang 843300, China

Online:2021-02-20 Published:2021-01-29
Correspondence author: ZHANG Rui (1979-), female, professor, research field: High-yield walnut cultivation and molecular breeding,(E-mail)843037930@qq.com
Supported by:
Supported by the XPCC Division (Region) Development and Innovation Support Program Project(2017DB001);First Division Aral City Scientific Research Project (2017YY20)

核桃实生幼苗光合特性对高磷胁迫的响应

刘春花¹, 张锐¹, 谢富², 王阳¹, 胡凯红¹, 王健健¹, 宋岩¹, 赵振坤¹, 张建良³

1.新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室/塔里木大学植物科学学院/南疆特色果树高效优质栽培与深加工技术国家地方联合工程实验室,新疆阿拉尔 843300;
2.阿克苏教育学院,新疆阿克苏 843000;
3.新疆生产建设兵团第一师三团农业发展服务中心,新疆阿拉尔 843300

通讯作者: 张锐(1979-),女,新疆人,教授,博士,博士生导师,研究方向为核桃高产栽培及分子育种,(E-mail)843037930@qq.com
作者简介:刘春花(1992-),女,新疆人,硕士研究生,研究方向为果树栽培,(E-mail)1765537488@qq.com
基金资助:
兵团师域(区域)发展创新支持计划(2017DB001);兵团第一师阿拉尔市科研课题计划(2017YY20)

Abstract

Abstract: 【Objective】 To reveal the photosynthetic physiology and material accumulation characteristics of walnut rootstock seedlings under high phosphorus stress in the hope of providing a reference for the application and management of phosphate fertilizer on walnut seedlings.【Method】 Xinxin 2 walnut seedlings were taken as research materials, and the biomass, photosynthetic characteristics, fluorescence characteristics, photosynthetic products and nutrient elements of walnuts were compared under high phosphorus gradient.【Result】 The results showed that the overall biomass of walnut seedlings showed a downward trend with the increase of phosphorus application. Net photosynthetic rate, stomatal conductance, intercellular CO₂ concentration, transpiration rate, initial fluorescence, maximum fluorescence, maximum photochemical quantum efficiency, and light and pigment increased first and then decreased, and reached the peak value under P₂ treatment. Soluble sugars and soluble proteins synthesized by different phosphorus levels in walnut seedlings increased with the increase of phosphorus gradient, and acid phosphatase activity decreased. Sulfur, potassium, molybdenum, zinc, boron, and iron elements in walnut rootstock seedlings increased first and then declined with the increase of phosphorus supply level, and reached a peak under P₂ treatment. The phosphorus, magnesium, calcium, copper, and manganese elements followed the phosphorus level. It increased with the increase of P and reached the maximum value under P₄ treatment, which indicated that excessive phosphorus was not conducive to the absorption of the above elements by walnut seedlings.【Conclusion】 High phosphorus stress significantly, inhibited the growth and photosynthesis of walnut seedlings, and broke the balance between the nutrient contents of the walnut seedlings. Too high or too low phosphorus is not conducive to the growth and development of walnut seedlings.

Key words: walnut seedling; high phosphorus stress; the biomass; the photosynthetic characteristics; fluorescence characteristics; photosynthetic product; nutritional element

摘要： 【目的】研究高磷胁迫下核桃砧木苗的光合生理及物质积累特性,为核桃直播建园砧木苗磷肥施用管理提供参考。【方法】 以新新2核桃幼苗为材料,比较其在高磷梯度下生物量、光合特性、荧光特性、光合产物及叶片营养元素的影响。【结果】 核桃实生幼苗的生物量整体随着施磷量的增加呈下降趋势,净光合速率、气孔导度、胞间CO₂浓度、蒸腾速率、初始荧光、最大荧光、最大光化学量子效率及光合色素含量均呈先上升后下降的趋势,在P₂处理下达到峰值。核桃幼苗合成的可溶性糖和可溶性蛋白随磷梯度的增大呈上升趋势,酸性磷酸酶活性呈下降趋势。核桃砧木苗叶片中硫、钾、钼、锌、硼和铁元素随着供磷水平的升高呈先扬后抑趋势,于P₂处理下达峰值,磷、镁、钙、铜和锰元素随着磷水平的增大而增加,于P₄处理下达到最大值,磷过量不利于核桃幼苗对上述元素的吸收。【结论】 高磷胁迫显著抑制了核桃幼苗的生长及光合作用,打破了实生核桃幼苗各养分含量之间的平衡。磷水平过高或过低都不利于核桃实生幼苗的生长和发育。

关键词: 核桃幼苗, 高磷胁迫, 生物量, 光合特性, 荧光特性, 光合产物, 营养元素

CLC Number:

LIU Chunhua, ZHANG Rui,XIE Fu,WANG Yang,HU Kaihong,WANG Jianjian SONG Yan,ZHAO Zhenkun,ZHANG Jianliang. Response of Photosynthetic Characteristics of Walnut Seedlings to High Phosphorus Stress[J]. Xinjiang Agricultural Sciences, 2021, 58(2): 254-264.

刘春花, 张锐, 谢富, 王阳, 胡凯红, 王健健, 宋岩, 赵振坤, 张建良. 核桃实生幼苗光合特性对高磷胁迫的响应[J]. 新疆农业科学, 2021, 58(2): 254-264.

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Response of Photosynthetic Characteristics of Walnut Seedlings to High Phosphorus Stress

核桃实生幼苗光合特性对高磷胁迫的响应

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