Studies on Sodium Naphthalene-1-acetate and Compound Sodium Nitrophenolate Enhancing Pepper Resistance to Stress under Intensity of Sub-optimal Temperature and Light
LI Wenke，HUANG Bin，LI Menglu，WANG Jun，SUN Mintao，YAN Yan，HE Chaoxing，YU Xianchang，LI Yansu*
（Institute of Vegetables and Flowers，Chinese Academy of Sciences，Beijing 100081，China）
Abstract：Sodium naphthalene-1-acetate（SNA）improves plant stress resistance by promoting root system growth etc. methods. Compound sodium nitrophenolat（CSN）can also enhance plant stress resistance．In order to explore the promoting effect of 2 solution combination on pepper seedlings in suboptimal temperature and light environment，this paper took‘Longjiao 3’as test material，sprayed different concentrations of SNA and CSN（10 + 0 mg · L-1，0 + 70 mg · L-1，5 + 35 mg · L-1，10 + 70 mg · L-1）on papper seedlings, and studied the changes in their morphological and physiological indexes under suboptimal temperature and light environment〔（12 ± 2）℃ /（8 ± 2）℃，（150 ± 20）μmol · m-2 · s-1〕．The results showed that sub-optimal temperature and light environment could inhibit the growth of pepper seedlings. Spraying different concentrations of exogenous SNA and CSN could all promote pepper seedling growth，increase chlorophyll content，reduce chlorophyll a/b value，improve net photosynthetic rate，enhance activities of SOD and CAT enzymes，and increase endogenous hormones（IAA，iPA，BR）contents，among which the compound spraying effect of 5 mg · L-1 SNA and 35 mg · L-1 CSN was the best．To certain extent，the commond spraying with（5 + 35 mg · L-1）concentration could reduce the damage brought by sub-optimal temperature and light environment，thereby improved pepper seedlings stress resistance．
李文科，黄斌，李梦露，王君，孙敏涛，闫妍，贺超兴，于贤昌，李衍素 *. α- 萘乙酸钠和复硝酚钠对亚适宜温光胁迫下辣椒抗逆性的影响[J]. 中国蔬菜, 2022, 1(2): 40-46.
LI Wenke，HUANG Bin，LI Menglu，WANG Jun，SUN Mintao，YAN Yan，HE Chaoxing，YU Xianchang，LI Yansu*. Studies on Sodium Naphthalene-1-acetate and Compound Sodium Nitrophenolate Enhancing Pepper Resistance to Stress under Intensity of Sub-optimal Temperature and Light. China Vegetables, 2022, 1(2): 40-46.
