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

作　　者：ZHANG Guan-chu DAI Liang-xiang DING Hong CI Dun-wei NING Tang-yuan YANG Ji-shun ZHAO Xin-hua YU Hai-qiu ZHANG Zhi-meng 

机构地区：[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

出　　处：《Journal of Integrative Agriculture》2020年第3期690-699,共10页农业科学学报（英文版）

基　　金：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);the Shandong Provincial Natural Science Foundation,China(ZR2017YL023)

摘　　要：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 50 th 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.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 50 th 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.

关 键 词：salt stress PEANUT ecological adaptability photosynthetic product 

分 类 号：S565.2[农业科学—作物学]