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DOI10.1002/jpln.201800435
Role of nitrogen supplementation in alleviating drought-associated growth and metabolic impairments in Phoebe zhennan seedlings
Tariq, Akash1,2; Pan, Kaiwen1; Olatunji, Olusanya Abiodun1,2; Graciano, Corina3; Li, Ningning4; Li, Zilong1,2; Song, Dagang1,2; Sun, Feng1,2; Justine, Meta Francis1,2; Huang, Dan1,2; Gong, Shanxing1; Pandey, Bikram1,2; Idrees, Muhammad1,2; Dakhil, Mohammed A.1,2,5
发表日期2019
ISSN1436-8730
EISSN1522-2624
卷号182期号:4页码:586-596
英文摘要

Drought is one of the major environmental stresses altering forest productivity. However, nutrient availability can modulate drought resistance. Phoebe zhennan (gold Phoebe) is a high-quality timber-producing but threatened tree species in China, facing serious anthropogenic disturbances and abiotic constraints that restrict its growth and development. However, little attention has been given to designing adaptive strategies for its management by evaluating the possible role of major nutrients, particularly nitrogen (N), on its morphological and physio-biochemical responses under water stress. To evaluate these responses, a complete randomized design was followed to investigate the effects of two irrigation levels (well-watered and drought-stressed conditions) and N fertilization treatments (with and without N). Drought stress significantly affected the growth of seedlings, as indicated by impaired photosynthesis, pigment degradation, disrupted N metabolism, over-production of reactive oxygen species and enhanced lipid peroxidation. Nitrogen supplementation under drought stress had remarkable positive effects on the growth through physio-biochemical adjustments as shown by higher level of nitrogenous compounds and up-regulation of N-associated metabolic enzymes activities which might be due to N-mediated improved leaf relative water contents and photosynthetic efficiency. In addition, N application reduced oxidative stress and membrane damage, and maintained a high accumulation of osmolytes. However, in well-watered seedlings N fertilization significantly improved root biomass and net CO2 assimilation rate suggesting high N-use efficiency of the seedlings. These findings reveal that drought significantly affects the growth of P. zhennan, while N fertilization plays a crucial role in alleviating water stress damage by improving its drought tolerance potential at low metabolic costs. Therefore, N fertilization could be considered as an effective strategy for the conservation and management of P. zhennan in the face of future climate change.


WOS研究方向Agriculture ; Plant Sciences
来源期刊JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/101331
作者单位1.Chinese Acad Sci, Chengdu Inst Biol, Key Lab Sichuan Prov, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu 610041, Sichuan, Peoples R China;
2.Univ Chinese Acad Sci, Int Coll, Beijing 100049, Peoples R China;
3.Univ Nacl La Plata, Inst Fisiol Vegetal, Consejo Nacl Invest Cient & Tecn, Buenos Aires, DF, Argentina;
4.Southwest Univ, Coll Resources & Environm, Chongqing 400715, Peoples R China;
5.Helwan Univ, Fac Sci, Bot & Microbiol Dept, Cairo 11790, Egypt
推荐引用方式
GB/T 7714
Tariq, Akash,Pan, Kaiwen,Olatunji, Olusanya Abiodun,et al. Role of nitrogen supplementation in alleviating drought-associated growth and metabolic impairments in Phoebe zhennan seedlings[J],2019,182(4):586-596.
APA Tariq, Akash.,Pan, Kaiwen.,Olatunji, Olusanya Abiodun.,Graciano, Corina.,Li, Ningning.,...&Dakhil, Mohammed A..(2019).Role of nitrogen supplementation in alleviating drought-associated growth and metabolic impairments in Phoebe zhennan seedlings.JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE,182(4),586-596.
MLA Tariq, Akash,et al."Role of nitrogen supplementation in alleviating drought-associated growth and metabolic impairments in Phoebe zhennan seedlings".JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE 182.4(2019):586-596.
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