Application of titanium regulates the functional components of photosynthetic apparatus in grafted seedlings of Carya cathayensis Sarg. under shade.
Application of titanium regulates the functional components of photosynthetic apparatus in grafted seedlings of Carya cathayensis Sarg. under shade.
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DOI：
10.1016/j.chemosphere.2021.133301
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发表时间：
2021-12
期刊：
影响因子：
8.8
通讯作者：
Daoliang Yan;Feng Song;Zhen Li;Anket Sharma;Xiao-Qun Xie;Tingting Wu;Xiaofei Wang;Yi He;Jiabao Chen;Qiaoyu Huang;Lu Zhao;Rongling Wu;Shihui Niu;Huwei Yuan;Bingsong Zheng
中科院分区：
文献类型：
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作者：
Daoliang Yan;Feng Song;Zhen Li;Anket Sharma;Xiao-Qun Xie;Tingting Wu;Xiaofei Wang;Yi He;Jiabao Chen;Qiaoyu Huang;Lu Zhao;Rongling Wu;Shihui Niu;Huwei Yuan;Bingsong Zheng
光是植物正常生长发育的重要环境因子。（山核桃）面临低光照条件，特别是在快速生长期的阴天或雨天造成的光照条件，对其生长造成了不利影响。为缓解光照不足对山核桃栽培的不利影响，采用抗水解稳定钛（ASIT）对不同遮荫条件下生长的3种山核桃嫁接苗和未嫁接苗进行叶面喷施。结果表明，施用ASIT后，山核桃嫁接苗的单位面积叶质量和叶绿素含量增加。ASIT处理对遮荫条件下幼苗的Rubisco含量和光合速率（Pn）有显著的正向影响，尤其是在处理的第45 d，但ASIT处理与不同遮荫处理之间的互作效应显著。钛在根中的积累量最高，其次是叶，茎中次之，而ASIT对根和叶的影响在50 ± 5%遮荫下最显著。严重的遮荫抑制了生长，并导致叶绿体超微结构严重破坏。此外，ASIT的作用是砧木依赖性的，因为ASIT对C/H嫁接苗的缓解效果最弱。综上所述，应用ASIT可以提高山核桃嫁接苗的抗阴胁迫能力。
Light acts as a key environmental factor for normal growth and development of plants.Carya cathayensisSarg. (hickory) faces low light conditions, especially those caused by cloudy or rainy days during the rapid growth period, which has caused adverse effects on its growth. In the current investigation, to alleviate the adverse effects of insufficient light on the cultivation of hickory, anti-hydrolyze stabilized ionic titanium (ASIT) was sprayed on the leaves of the three kinds of grafted seedlings and the non-grafted seedlings of hickory grown under different shade conditions. Results showed that the leaf mass per area and chlorophyll content of grafted hickory seedlings were increased after ASIT application. Rubisco content and photosynthetic rate (Pn) of seedlings grown under shading conditions were positively affected by ASIT treatment, especially on the 45th day of treatment, while the interaction effects of the two parameters between ASIT application and different shade treatments were significant. Titanium accumulation was the highest in roots, followed by leaves, and then in stems, while ASIT had the most significant effects on roots and leaves under 50 ± 5% shade. Severe shading inhibited growth and lead to serious destruction of chloroplast ultrastructure. In addition, the role of ASIT was rootstock-dependent, since ASIT had the weakest mitigation effect on the C/H grafted seedlings. To sum up, the application of ASIT to the grafted seedlings of hickory could improve its ability to resist shade stress.