Journal of Integrative Agriculture ›› 2020, Vol. 19 ›› Issue (3): 690-699.DOI: 10.1016/S2095-3119(19)62608-0

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  • 收稿日期:2018-10-12 出版日期:2020-03-01 发布日期:2020-03-04

Response and adaptation to the accumulation and distribution of photosynthetic product in peanut under salt stress

ZHANG Guan-chu1, 2, DAI Liang-xiang2, DING Hong2, CI Dun-wei2, NING Tang-yuan3, YANG Ji-shun2, ZHAO Xin-hua1, YU Hai-qiu1, ZHANG Zhi-meng
  

  1. 1 College of Agronomy, Shenyang Agricultural University, Shenyang 110866, P.R.China
    2 Shandong Peanut Research Institute, Qingdao 266100, P.R.China
    3 State Key Laboratory of Crop Biology/Key Laboratory of Crop Water Physiology and Drought-tolerance Germplasm Improvement, Ministry of Agriculture and Rural Affairs/College of Agronomy, Shandong Agricultural University, Tai’an 271018, P.R.China
  • Received:2018-10-12 Online:2020-03-01 Published:2020-03-04
  • Contact: Correspondence YU Hai-qiu, E-mail: haiqiuyu@163.com; ZHANG Zhi-meng, E-mail: qinhdao@126.com
  • Supported by:
    This research was funded by the earmarked fund for China Agriculture Research System (CARS-13), the National Natural Science Foundation of China (31771732), the Shandong Modern Agriculture Innovation Team, China (peanut) (SDAIT-04-06), the Key Research and Development Plan of Shandong Province, China (2017CXGC0308), the Key Scientific and Technological Innovation Program of Shandong Academy of Agricultural Sciences, China (CXGC2017D02), and the Shandong Provincial Natural Science Foundation, China (ZR2017YL023).

摘要:

本研究以花育25为材料,设置非盐胁迫(CK),0.15%(S1)和0.3%盐胁迫(S2)三个处理,探究了盐胁迫对花生光合特性、植株不同器官干物质积累与分配及荚果发育动态的影响。结果表明,盐胁迫降低了花生的净光合速率(Pn),SPAD值,单株叶面积和产量;播种后第50天,CK的Pn分别较S1和S2处理高出13.71%和28.72%。同一生育期内,处理间的SPAD值差异均为CK>S1>S2。盐胁迫降低了花生的单株荚果重,百果重,百仁重和出米率,大小为CK>S1>S2。与CK相较,花生通过改变了光合产物在不同器官中的分配比例来适应盐胁迫,在营养生长和早期生殖期生长阶段,S1和S2处理增加了光合产物在茎和荚果中分配比例。整个生育期内,S1和S2处理的根系干重集中分布在0-40厘米的土壤层中。荚果发育过程中,S1和S2处理的荚果体积、干重和果仁干重的最大生长速率(Vmax)均下降;收获时,S1和S2处理的荚果和果仁的体积较CK均降低,因此盐胁迫下花生通过降低荚果和果仁体积来提高饱满度。以上发现为盐碱地种植花生提供了理论指导


Abstract:

To clarify the response and adaptability of peanut under salt stress, Huayu 25 was used as the material, and non-salt stress (CK), 0.15% salt stress (S1), and 0.3% salt stress (S2) were applied as three treatments.  The study analysed the effects of salt stress on photosynthetic characteristics, photosynthetic substances accumulation and distribution as well as the ecological adaptability of peanuts.  The results showed that net photosynthetic rate (Pn), SPAD value, leaf area, and peanut yield were reduced under salt stress.  Pn in CK was 13.71 and 28.72% higher than that in S1 and S2 at the 50th day after planting, respectively.  At the same growth period, the SPAD value among treatments was ranked as follows: CK>S1>S2.  The 100-pod mass, 100-kernel mass, kernel rate to pod, and pod mass per plant were reduced under salt stress, and the trend was CK>S1>S2.  The distribution proportion of dry matter in different organs of peanut plant was changed to adapt to such stress.  Roots under salt stress intensively distributed in a 0–40 cm soil layer for salt resistance.  Dry mass proportion in stems and pods increased during the vegetative stage and early period of reproductive stage, respectively.  The maximum growth rates of the pod volume, pod dry weight, and seed kernel dry weight all declined, and the pod and kernel volume at harvest were reduced, improving the seed plumpness under salt stress.  This finding could be useful in growing peanut in saline soil.
 

Key words: salt stress ,  peanut ,  ecological adaptability ,  photosynthetic product