摘要
【目的】研究增温与干旱互作条件下灵武长枣果实吲哚-3-乙酸(IAA)、脱落酸(ABA)、玉米素(ZT)、茉莉酸(JA)含量的变化,为灵武长枣高效栽培提供指导。【方法】以6年生的灵武长枣为试验对象,设置大气温度和土壤含水量二因素裂区试验,其中大气温度设置2个水平处理,分别为大气常温环境和相对升高2℃的大气增温环境,土壤水分含量设置3个水平,分别是正常土壤供水水平、中度干旱水平、重度干旱水平,测定灵武长枣果实不同发育时期的IAA、ABA、ZT、JA含量。【结果】模拟增温和干旱二者交互作用对灵武长枣果实主要内源激素(IAA、ABA、ZT、JA)含量影响显著(P<0.05);与常温环境相比,增温2℃时,灵武长枣果实ABA、IAA和JA含量升高;与正常土壤供水相比,中度干旱胁迫下灵武长枣果实ABA、ZT、JA含量升高,IAA含量下降,重度干旱胁迫下灵武长枣果实ABA、JA含量升高,IAA、ZT含量下降。【结论】大气增温2℃有利于灵武长枣果实IAA和JA含量的积累,干旱胁迫加剧了增温对果实IAA和JA含量积累作用;干旱胁迫有利于ABA、ZT含量的积累,大气增温2℃加剧了干旱对ABA的积累,但减缓了干旱对ZT含量积累的促进作用。
【Objective】 Effect of elevated temperature and drought stresses on the content of endogenous hormones in jujube fruits was studied. 【Method】 In a simulated experiment, 6-year-old Zipiphus jujuba Mill cv. Lingwuchangzao plants were artificially exposed to varied temperatures and restricted water supplies. Ambient atmosphere temperature(T1) and one of 2o C above it(T2) were applied in combination with a simulated water supply for normal condition in soil(D1), moderate drought(D2), or severe drought(D3). Contents of endogenous hormones(i.e., IAA, ABA, ZT, and JA) in the jujube fruits born from the trees at 7 ripening stages were determined. 【Result】 The interactive effect on the hormones by the simulated temperature and drought conditions was significant(P<0.05). The contents of ABA, IAA, and JA in the fruits were higher when the atmospheric temperature was raised 2 ℃ above normal. Those of ABA, ZT, and JA also became greater under D2, but that of IAA lower,than D1;whereas those of ABA and JA, increased and those of IAA and ZT, decreased under D3. 【Conclusion】 The slightly elevated temperature by 2 ℃ seemed to benefit the accumulation of IAA and JA in the jujube fruits, while the drought stress accentuated the temperature effect on the contents of IAA and JA. Water deprivation appeared to benefit ABA and ZT accumulation, and temperature elevation by 2 ℃ promoted the accumulation of ABA but hindered that of ZT.
作者
陆晖
陈丽华
宋丽华
LU Hui;CHEN Lihua;SONG Lihua(School of Agriculture,Ningxia University,Yinchuan,Ningxia 750021,China)
出处
《福建农业学报》
CAS
CSCD
北大核心
2022年第11期1438-1447,共10页
Fujian Journal of Agricultural Sciences
基金
国家自然科学基金项目(32160360)。
关键词
灵武长枣
模拟气温
干旱
内源激素
Zipiphus jujuba Mill cv.Lingwuchangzao
simulated atmosphere temperature
drought stress
endogenous hormones
