The influence of nitrogen availability on anatomical and physiological responses of Populus alba x P-glandulosa to drought stress

Junyu Song, Yang Wang, Yuehan Pan, Jiayin Pang, Xin Zhang, Junfeng Fan, Yi Zhang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

BackgroundDrought and nitrogen (N) deficiency are two major limiting factors for forest productivity in many ecosystems. Elucidating the mechanisms underlying the influence of soil N availability on drought responses of tree species is crucial to improve tree growth under drought.ResultsThe root proliferation under drought was enhanced by adequate N application. Vessel frequency in xylem increased upon drought, with more significant increase under adequate N conditions compared with that under low N conditions, possibly leading to increased hydraulic safety. Nitrogen application under drought increased indole acetic acid (IAA), which contributed to the adaptive changes of xylem. Nitrogen application increased leaf abscisic acid (ABA) concentration, therefore regulated stomata adjustment, and promoted intrinsic water use efficiency (WUEi). Moreover, N application promoted antioxidant defense in leaves by showing increased level of free proline and carotenoid, which improved drought tolerance and growth performance of poplars.ConclusionsAnatomical and physiological responses of Populus to drought were suppressed by N deficiency. Adequate N application promoted adaptive changes of root and xylem under drought and increased hydraulic safety. Nitrogen addition under drought also increased leaf ABA level which may regulate stomata adjustment and promote WUEi. Moreover, nitrogen application improved antioxidant defense in leaves with increased levels of antioxidants. These positive regulations improved drought tolerance and growth performance of poplars.

Original languageEnglish
Article number63
Number of pages12
JournalBMC Plant Biology
Volume19
Issue number1
DOIs
Publication statusPublished - 8 Feb 2019

Cite this

Song, Junyu ; Wang, Yang ; Pan, Yuehan ; Pang, Jiayin ; Zhang, Xin ; Fan, Junfeng ; Zhang, Yi. / The influence of nitrogen availability on anatomical and physiological responses of Populus alba x P-glandulosa to drought stress. In: BMC Plant Biology. 2019 ; Vol. 19, No. 1.
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title = "The influence of nitrogen availability on anatomical and physiological responses of Populus alba x P-glandulosa to drought stress",
abstract = "BackgroundDrought and nitrogen (N) deficiency are two major limiting factors for forest productivity in many ecosystems. Elucidating the mechanisms underlying the influence of soil N availability on drought responses of tree species is crucial to improve tree growth under drought.ResultsThe root proliferation under drought was enhanced by adequate N application. Vessel frequency in xylem increased upon drought, with more significant increase under adequate N conditions compared with that under low N conditions, possibly leading to increased hydraulic safety. Nitrogen application under drought increased indole acetic acid (IAA), which contributed to the adaptive changes of xylem. Nitrogen application increased leaf abscisic acid (ABA) concentration, therefore regulated stomata adjustment, and promoted intrinsic water use efficiency (WUEi). Moreover, N application promoted antioxidant defense in leaves by showing increased level of free proline and carotenoid, which improved drought tolerance and growth performance of poplars.ConclusionsAnatomical and physiological responses of Populus to drought were suppressed by N deficiency. Adequate N application promoted adaptive changes of root and xylem under drought and increased hydraulic safety. Nitrogen addition under drought also increased leaf ABA level which may regulate stomata adjustment and promote WUEi. Moreover, nitrogen application improved antioxidant defense in leaves with increased levels of antioxidants. These positive regulations improved drought tolerance and growth performance of poplars.",
keywords = "Drought tolerance, Nitrogen, Populus, Phytohormone, Antioxidant defense, CONTRASTING POPLAR GENOTYPES, TRANSCRIPTIONAL RESPONSES, OXIDATIVE STRESS, CATALPA-BUNGEI, PLANT, ROOT, PHOSPHORUS, TOLERANCE, METABOLISM, EXPRESSION",
author = "Junyu Song and Yang Wang and Yuehan Pan and Jiayin Pang and Xin Zhang and Junfeng Fan and Yi Zhang",
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journal = "BMC Plant Biology",
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The influence of nitrogen availability on anatomical and physiological responses of Populus alba x P-glandulosa to drought stress. / Song, Junyu; Wang, Yang; Pan, Yuehan; Pang, Jiayin; Zhang, Xin; Fan, Junfeng; Zhang, Yi.

In: BMC Plant Biology, Vol. 19, No. 1, 63, 08.02.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The influence of nitrogen availability on anatomical and physiological responses of Populus alba x P-glandulosa to drought stress

AU - Song, Junyu

AU - Wang, Yang

AU - Pan, Yuehan

AU - Pang, Jiayin

AU - Zhang, Xin

AU - Fan, Junfeng

AU - Zhang, Yi

PY - 2019/2/8

Y1 - 2019/2/8

N2 - BackgroundDrought and nitrogen (N) deficiency are two major limiting factors for forest productivity in many ecosystems. Elucidating the mechanisms underlying the influence of soil N availability on drought responses of tree species is crucial to improve tree growth under drought.ResultsThe root proliferation under drought was enhanced by adequate N application. Vessel frequency in xylem increased upon drought, with more significant increase under adequate N conditions compared with that under low N conditions, possibly leading to increased hydraulic safety. Nitrogen application under drought increased indole acetic acid (IAA), which contributed to the adaptive changes of xylem. Nitrogen application increased leaf abscisic acid (ABA) concentration, therefore regulated stomata adjustment, and promoted intrinsic water use efficiency (WUEi). Moreover, N application promoted antioxidant defense in leaves by showing increased level of free proline and carotenoid, which improved drought tolerance and growth performance of poplars.ConclusionsAnatomical and physiological responses of Populus to drought were suppressed by N deficiency. Adequate N application promoted adaptive changes of root and xylem under drought and increased hydraulic safety. Nitrogen addition under drought also increased leaf ABA level which may regulate stomata adjustment and promote WUEi. Moreover, nitrogen application improved antioxidant defense in leaves with increased levels of antioxidants. These positive regulations improved drought tolerance and growth performance of poplars.

AB - BackgroundDrought and nitrogen (N) deficiency are two major limiting factors for forest productivity in many ecosystems. Elucidating the mechanisms underlying the influence of soil N availability on drought responses of tree species is crucial to improve tree growth under drought.ResultsThe root proliferation under drought was enhanced by adequate N application. Vessel frequency in xylem increased upon drought, with more significant increase under adequate N conditions compared with that under low N conditions, possibly leading to increased hydraulic safety. Nitrogen application under drought increased indole acetic acid (IAA), which contributed to the adaptive changes of xylem. Nitrogen application increased leaf abscisic acid (ABA) concentration, therefore regulated stomata adjustment, and promoted intrinsic water use efficiency (WUEi). Moreover, N application promoted antioxidant defense in leaves by showing increased level of free proline and carotenoid, which improved drought tolerance and growth performance of poplars.ConclusionsAnatomical and physiological responses of Populus to drought were suppressed by N deficiency. Adequate N application promoted adaptive changes of root and xylem under drought and increased hydraulic safety. Nitrogen addition under drought also increased leaf ABA level which may regulate stomata adjustment and promote WUEi. Moreover, nitrogen application improved antioxidant defense in leaves with increased levels of antioxidants. These positive regulations improved drought tolerance and growth performance of poplars.

KW - Drought tolerance

KW - Nitrogen

KW - Populus

KW - Phytohormone

KW - Antioxidant defense

KW - CONTRASTING POPLAR GENOTYPES

KW - TRANSCRIPTIONAL RESPONSES

KW - OXIDATIVE STRESS

KW - CATALPA-BUNGEI

KW - PLANT

KW - ROOT

KW - PHOSPHORUS

KW - TOLERANCE

KW - METABOLISM

KW - EXPRESSION

U2 - 10.1186/s12870-019-1667-4

DO - 10.1186/s12870-019-1667-4

M3 - Article

VL - 19

JO - BMC Plant Biology

JF - BMC Plant Biology

SN - 1471-2229

IS - 1

M1 - 63

ER -