The vascular cambium is located between the xylem and phloem, which is responsible for many growth and development processes, and also plays an important role in wood production. In simulating cambium growth and potential molecular processes, deep imaging combined with gene expression analysis is a cutting-edge research direction, and mathematical modeling and simulation combined with real-time imaging have important application prospects. Based on this technique, some representative achievements at the molecular level of cambium activity are summarized, and the future research prospects are proposed. At present, molecular studies on cambium activity in plants mainly focus on: (1) cambium activity is regulated by plant hormone signaling; (2) cambium activity is regulated by transcription factors and peptide receptor signaling; (3) cambium activity is regulated by receptor kinase signals peptide receptor signaling. The main conclusions are that WOX4, WOX14, HB4, HB7, HB8 and ANT positively regulate the activities of tree cambium and can be used as the first choice for transgenic wood roughening breeding. In the future, the analysis of cell-to-cell communication connections in the cambium through computer models can better analyze the molecular mechanism of vascular cambium development in woody plants. [Ch. 3 tab. 68 ref.]
Phloem unloading contains a series of complex processes. Phloem unloading plays an important role in the transportation and distribution of assimilates in horticultural plants(fruit trees, vegetables, ornamental plants). This study summarizes the main ways of phloem unloading, and focuses on the main research results of phloem unloading in the growth and development of horticultural plants, including: (1) the main sugar substances transported by phloem; (2) phloem unloading mode; (3) research approaches for phloem unloading; (4) research on phloem unloading in horticultural plants. The key enzymes and sucrose transporters involved in phloem unloading process need further clarification with in-depth research combining the emergence of new technologies, which will help to further elucidate the underlying molecular regulation mechanism of phloem unloading during the key economic and (or) ornamental traits formation in horticultural plants, as well as to provide new ideas for detail research on phloem unloading in other plants. [Ch, 1 fig. 1 tab. 75 ref.]
Atmospheric nitrogen (N) deposition is a global threat to biodiversity and ecosystem function. Since emission controls, N deposition has decreased or stabilized in European and North America, and China began to be stabilized in 2010. The future trajectory of N deposition may differ by regions. In this study, literature retrieval and extensive analytic methods were used to analyze N deposition recovery. The reaction of the forest ecosystem’ s soil (acidification and solution chemistry), structure (vegetation-microbial diversity), and function (productivity and carbon sequestration) to decreasing N deposition was studied. Soil solution chemistry (e.g., nitrate and ammonium concentrations, etc.) may responded very rapidly to reducing N input, whereas plant species composition, soil microbial communities, and soil processes may be slow in recovery. When N deposition is controlled, soil acidification can be reduced, and tree growth can be promoted. It is also possible that the vitality of plant may still deteriorating and soil acidity persists due to high rate of atmospheric N deposition. Restoration of plant diversity may face potential barriers to recovery and maintain eutrophication in the short term, but it supports the rise of species in a nutrient-poor. The response of forest ecosystem restoration to emission reduction strategies is delayed. The legacy of earlier N deposition result in a slow recovery, but recovery is simply a matter of time. Therefore, recovery from high N loads is a long and sluggish process, and further emission reduction efforts is still needed in the future. [Ch, 94 ref.]
Bimonthly, Start in 1984
Supervisor:Department of Education of Zhejiang Province
Sponsor:Zhejiang A&F University
Editor-in-Chief:SHEN Xi
Editor:Editorial Department of Journal of Zhejiang A&F University
Tel:0571-63732749
E-mail:zlxb@zafu.edu.cn
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1
Carbon-fixing oriented management patterns of Phyllostachys pubescens and their benefits
WANG Xi-feng, SHEN Yue-qin, WANG Feng, ZHENG Xu-li, HU Zhong-ming -
2
Continuum removal based hyperspectral characteristic analysis of leaves of different tree species
DING Li-xia, WANG Zhi-hui, GE Hong-li -
3
Research progress on agronomic characteristics of Miscanthus
ZHAN Wei-jun, REN Jun-xia, JIN Song-heng, HUANG You-jun, PAN Yin-hui, ZHENG Bing-song -
4
Efficacy of three insecticides against Phenacoccus kaxinus and Eucryptorrhynchus brandti
CHU Jiamiao, ZHONG Tailin, HUANG Shanshan -
5
Application and prospect of organic biocides in timber preservation
SUN Fang-li, BAO Bin-fu, CHEN An-liang, ZHOU Yue-ying, YU Hong-wei, DU Chun-gui