超敏蛋白对低温胁迫下茶树生理特性的影响

 超敏蛋白是一种诱导植物抗逆性的新型生物制剂。为了解超敏蛋白在低温胁迫过程中对茶树耐寒性的影响，以茶树品种‘迎霜’为试材，分别在常温和4 ℃下喷施超敏蛋白，研究了在低温胁迫下超敏蛋白对茶树叶片生理特性的影响。结果表明：常温下，超敏蛋白喷施的茶树叶片，在6 d内略微提高了渗透调节物质含量和抗氧化酶活性。低温胁迫下，茶树叶片中可溶性糖含量、可溶性蛋白含量、游离脯氨酸含量、丙二醛（MDA）含量、超氧化物歧化酶活性（SOD）、过氧化物酶活性（CAT）、过氧化氢酶（POD）活性均增加，叶绿素含量降低；喷施24 μg ? L^-1超敏蛋白后，低温下可在6 d内提高茶树叶片叶绿素、可溶性蛋白、可溶性糖、游离脯氨酸的含量，提高SOD、CAT、POD活性，从而缓解低温胁迫对茶树的伤害，增强茶树耐寒性。试验表明，喷施一定浓度的超敏蛋白可以有效提高茶树的耐寒性。

Effect of Harpin on Physiological Characteristics of Tea Plant Under Cold Stress

AIM: Exosomes are bi-lipid membrane originated in the cell endocytosis system and secreted into the extracellular matrix. The cells secrete exosomes into extracellular matrix to impact target cells with the significant functions of cell-cell information transmission and immunological regulation. Recent studies show that cell-cell communication regulated by exosomes can be found in both physiological and pathological conditions of cardiovascular diseases (CVD). Exosomes derived from many types of cells (such as myocardial cells, endothelial cells and stem cells) play an important regulatory role in the pathogenetic mechanism of CVD. Meanwhile, exosome-based investigations have shown huge potential for the treatment of CVD. This review will focus on the biological characteristics and functions of exosomes in the diagnosis and treatment of CVD.