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Ma Xiaowen,Gu Jinbao,Luo Qingwen,Wen Mingfu,Li Hua,Wang Zhen-Yu 한국식물생명공학회 2022 Plant biotechnology reports Vol.16 No.1
β-Aminobutyric acid (BABA) and γ-aminobutyrate (GABA) had a positive role in alleviating the damage when plants were exposed to abiotic and biotic stresses. However, it is not known whether exogenous of GABA and BABA could improve the tolerance of cassava plants, and their synergistic benefits. In the current study, we found that the cassava seedling improved the tolerance by exogenous of BABA and GABA under salt and drought stress condition, as reflected by reducing the accu- mulation of hydrogen peroxide and increasing the activities of antioxidant enzymes. Meanwhile, the expression of genes encoding antioxidant enzymes was significantly unregulated by salt or drought stress after application of BABA and GABA, separately. Moreover, the transcript levels of DREB2A and SOS2 were significantly unregulated by salt after application of BABA and GABA, separately, and expression of DREB2A, NCED3, and CBF3 was significantly unregulated by drought stress after application of BABA and GABA, separately. Interestingly, there was a synergistic benefit on improving the plant stress tolerance by combining the application of BABA and GABA. Therefore, our study provides new insights into maintaining the high yield by combining use of the chemical compounds in cassava which is relatively hard to be genetically modified.
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Liu JunHe,Zhao Zhong,Yan Yan,Ali Abid,Ahmed Zeeshan,He DaHan,Yu Mingfu,Hang Jia,Perven Misbah,Nazir Tamsila,Tayyib Muhammad,Zhao ZiHua 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.4
An alfalfa grassland landscape was divided into 36 plots during 2014 season in Yuanzhou District of Guyuan city in Ningxia Hui Autonomous Region of P.R. China. In these three times repeated experiments, treatment of habitat fragmentation was divided into two grades: continuity (H = 0.0) and fragmentation (H = 1.0), and their habitat loss rate was divided into 6 grades: 90, 80, 70, 50, 20 and 0%. Considering habitat loss 0% of the plot as the reference, as a result of sweeping net and visual methods, results showed that the flight distance of the Harmonia axyridis was much higher than that of the Hippodamia variegata both in fragmentation and continuous habitats. In the alfalfa landscape, H. axyridis moved more by flying, while H. variegata moved more by crawling. There was a threshold effect that affected the movement behavior of lady beetles between 70 and 100% of the habitat loss. The population of the two species of lady beetles in the continuous habitat was higher than that in the habitat fragmentation and was more obvious in 70 and 50% plots of the habitat loss. The dispersal rate of the two species of lady beetles inside plots was higher than outside of the experimental plots, which reflected the low diffusivity of the ladybeetle. Habitat fragmentation affected the dispersal, migration and construction of two species of lady beetles on different spatial scales by disturbing the spread of natural enemies and searching for prey.
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