ACTA AGRICULTURAE BOREALI-SINICA ›› 2015, Vol. 30 ›› Issue (3): 111-116. doi: 10.7668/hbnxb.2015.03.020

Special Issue: Potato crops Drought and water saving

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Effects of Drought Stress on Photosynthetic Properties and Dry Matter Accumulation of Purple Sweet Potato

GONG Qiu1,2, WANG Xin1,2, KOU Meng2, TANG Wei2, ZHANG Yun-gang2, LIU Ya-ju2, LI Qiang2, MA Dai-fu1,2   

  1. 1. College of Life Science of Jiangsu Normal University, Xuzhou 221131, China;
    2. Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province, Xuzhou 221131, China
  • Received:2015-02-22 Published:2015-06-28

Abstract: In order to Screening drought resistant strains,The paper studied effect of drought stress on photosynheics and dry matter accumulation of 14 purple sweet potato cultivars (Xushu 28 as control) by the means of potting to mimic drought.The photosynthetic characteristics were measured at 20 d of drought stress and the yield were measured at 70 d of drought stress.The results showed that the leaf chlorophyll content index (CCI),net photosynthetic rate (Pn),stomatal conductance (Gs),transpiration rate (Tr),productions and dry matter weight decreased under the treatment of drought.The Ningzishu No.1 and Xuzishu No.6 had the highest values of CCI and Pn.The Yanshu No.0747 and Taizhong No.11 were greatly impacted by drought.Stomatal limitation was mainly responsible for the reduction in the photosynthetic rate of Xuzishu No.6,Xuzishu No.1,Xushu No.33,Xu 102903,Luozishu No.1,Shang 077-1, Ningzishu No.1 and Xushu 28,while the reduction in the photosynthetic rate of the other genotypes was due to non-stomatal limition.In conclusion,the Ningzishu No.1 and Xuzishu No.6 showed more tolerance agaist drought stress,but Yanshu No.0747 and Taizhong No.11 showed less tolerance agaist drought stress.

Key words: Drought stress, Purple sweet potato, Photosynthetic characteristic, Dry matter accumulation

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Cite this article

GONG Qiu, WANG Xin, KOU Meng, TANG Wei, ZHANG Yun-gang, LIU Ya-ju, LI Qiang, MA Dai-fu. Effects of Drought Stress on Photosynthetic Properties and Dry Matter Accumulation of Purple Sweet Potato[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(3): 111-116. doi: 10.7668/hbnxb.2015.03.020.

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