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Northwest A&F University (2020)

Effects of Nitrogen on Drought Signal Induction and Drought Tolerance in 84K Poplar Roots under Local Drought

杨灿

Titre : Effects of Nitrogen on Drought Signal Induction and Drought Tolerance in 84K Poplar Roots under Local Drought

Auteur : 杨灿

Grade : Master’s Theses 2020

Université : Northwest A&F University

Résumé partiel
Poplar(Populus species)is a fast-growing tree with characteristics of easy survival,fast growth,tall tree shape,large biomass,and strong resistance.It is the main afforestation tree species in the "three north" areas of my country.The double shortage of water and nitrogen is currently the main factor restricting the productivity of poplar plantations in my country.In view of the severe limitation of productivity of poplar plantations in my country due to the double shortage of water and nitrogen,a large number of studies have been carried out on the resistance of poplar to drought stress and water use efficiency,low nitrogen stress tolerance and nitrogen nutrition efficiency.However,there are few reports on nitrogen tolerance of poplar roots to drought stress.Compared with cultivated soil,forest soil has a higher degree of water heterogeneity in both horizontal and vertical directions,resulting in local drought in horizontal and vertical directions.However,there is no research on how nitrogen affects and regulates the signal response and drought tolerance of poplar trees to local soil drought.This paper will study the effect of nitrogen on drought signal induction and drought tolerance of poplar roots under local drought,and clarify the regulation mode of soil local drought and nitrogen nutrition coupling on poplar root plasticity and drought stress tolerance.It is of great theoretical guiding significance to realize scientific management and efficient cultivation of poplar plantation forests on sites with drought,water shortage and low nitrogen difficulties,increase the yield and quality of poplar wood,and improve the productivity of poplar plantation forests

Mots clés : Nitrogen ;Water;Root System ;Antioxidant Enzymes ;Osmotic Adjustment Substance ;

Présentation (CNKI)

Page publiée le 28 mars 2022