| 高立杨,贾旭梅,朱祖雷,赵通,刘兵,张瑞,张夏燚,黄宗昌,王延秀.盐碱复合胁迫下2种长富2号苹果砧穗组合的光合及生理特性[J].干旱地区农业研究,2020,38(2):177~184 |
| 盐碱复合胁迫下2种长富2号苹果砧穗组合的光合及生理特性 |
| Photosynthetic and physiological characteristics of two rootstock combinations with Changfu 2 as scion under saline\|alkali stress |
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| DOI：10.7606/j.issn.1000-7601.2020.02.25 |
| 中文关键词: 盐碱复合胁迫 砧穗组合 苹果 逆境生理 光合 |
| 英文关键词:combined saline\|alkali stress rootstock combination apple stress physiology photosynthesis |
| 基金项目:国家自然科学基金（31960581） |
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| 摘要点击次数: 1097 |
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| 中文摘要: |
| 以‘垂丝海棠（Malus halliana Koehne）’（cs）和‘平邑甜茶（Malus hupehensis）’（py）为基砧，其上分别嫁接‘长富2号’（fs）形成的2种砧穗组合（cs+fs,py+fs）为试材,通过盆栽浇灌Hoagland营养液加盐（100 mmol·L-1，NaCl与NaHCO3按摩尔比1∶1混合）的方法，研究盐碱复合胁迫对2种砧穗组合光合、抗氧化酶以及渗透调节的影响。结果表明：随着胁迫时间的延长，2种砧穗组合叶绿素合成受阻，光合电子传递受到抑制，渗透调节及抗氧化酶系统被破坏。其中，cs+fs的光合能力优于py+fs，胁迫至40 d时，cs+fs和py+fs的净光合速率分别较其对照降低了8.31%和45.88%；cs+fs的SOD、POD活性以及Pro含量的峰值比py+fs晚出现10 d，且其峰值分别较py+fs峰值高21.04%、15.94%和99.03%。胁迫至40 d时，cs+fs的叶绿素a+b、Pn、Gs、Tr分别比py+fs高178.49%、92.12%、296.64%、38.20%，而Ci相较于py+fs降低27.92%；cs+fs的SOD、POD活性和Pro含量分别比py+fs高45.71%、17.96%、114.50%。综上，盐碱复合胁迫下，cs+fs的光合能力以及清除活性氧、渗透调节及热耗散保护能力均强于py+fs。因此，cs+fs的耐盐碱能力优于py+fs。 |
| 英文摘要: |
| The rootstocks of ‘Malus halliana Koehne’ (cs) and ‘Malus hupehensis’ (py) were grafted with ‘Chang fu 2’ (fs) as the potting experiment materials, and irrigated by Hoagland nutrient solution with salt (100 mmol·L -1, NaCl and NaHCO3 mixed in molar ratio 1∶1). The effects of saline\|alkali stress on photosynthesis, antioxidant enzymes and osmoregulation of two scion\|rootstock were studied. The results showed that with the prolongation of stress time, the chlorophyll synthesis of the two combinations was blocked, the photosynthetic electron transport was suppressed, and the osmotic regulation and antioxidant enzyme system were destroyed. Among them, the photosynthetic capacity of cs+fs was better than that of py+fs, the net photosynthetic rate of cs+fs and py+fs decreased by 8.31% and 45.88%, respectively, when stressed to 40 days, and the peak value of SOD, POD activity, and Pro content of cs+fs appeared 10 days later than that of py+fs, and the peak value was 21.04%, 15.94%, and 99.03% higher than that of py+fs, respectively. After stressed 40 days, the chlorophyll a+b, Pn,Gs, and Tr of cs+fs were 178.49%, 92.12%, 296.64%, and 38.20% higher than those of py+fs, respectively, while Ci was 27.92% lower than py+fs. The SOD, POD activity, and Pro content of cs+fs were 45.71%, 17.96%, and 114.50% higher than those of py+fs, respectively. In summary, under combined salt\|alkali stress, photosynthetic capacity, scavenging reactive oxygen species, osmotic adjustment, and heat dissipation protection of cs+fs were stronger than those of py+fs. Therefore, the salt\|alkali tolerant ability of cs+fs was better than that of py+fs. |
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