|Table of Contents|

Effect of Nitrogen on Pennisetum sp.Seeding Stage Growth and Photosynthetic Physiological Characteristics(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2016年08
Page:
133-138
Research Field:
Publishing date:

Info

Title:
Effect of Nitrogen on Pennisetum sp.Seeding Stage Growth and Photosynthetic Physiological Characteristics
Author(s):
LIU Hongwei1; 2; ZHANG Rongrong1; LIU Yanling1; 2; XIE Changhai1; 2; LIN Hui1; 2; LIN Zhanxi1; 2; YE Wenyu1; 2
(1.School of Life Science，Fujian Agriculture and Forestry University，Fuzhou，Fujian 350002；2.China National Engineering Research Center of Juncao Technology，Fuzhou，Fujian 350002)
Keywords:
Pennisetum sp.; nitrogen levels; growth characteristics; photosynthesis; osmotic adjustment; membrane lipid peroxidation
PACS:
-
DOI:
10.11937/bfyy.201608037
Abstract:
Taking Pennisetum sp.as test material，hydroponic experiment was carried out to study the response of different concentration of nitrogen (N) on seeding stage growth and photosynthetic physiological characteristics of Pennisetum sp..The results showed that with the improvement of N concentration，plant height，total root length，root surface area，root volume，number of root forks，number of root tips all increased first and then decreased，leaf number，leaf area and stem diameter decreased；Pn，Tr and Gs rose and then dropped,Ci continuously dropped；the contents of photosynthetic pigment，soluble protein，soluble sugar，proline，and the activities of POD and SOD all showed a trend of first increasing and then decreasing，the content of NO3--N and the activity of CAT increased，while the content of MDA decreased.The study indicated that optimal N supply(5.00-10.00 mmol/L)could promote plant shoot and root growth，enhance photosynthesis，raise the contents of osmotic adjustable substances，reduce the content of MDA，and promote the activities of antioxidant enzymes，which was in favor of the growth of plant and strengthened their adaptability to the adverse environments.The growth and physiological metabolism activity was limited in different extent when the N supply was in short(0.00-0.50 mmol/L)or excessive(15.00 mmol/L)conditions.

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Last Update: 2016-06-30