Root foraging of birch and larch in heterogeneous soil nutrient patches under water deficit.

Water and nutrient are two critical factors that limit plant growth to spatial-temporal extents. Tree root foraging behavior has not received adequate attention in heterogeneous soil environments in temperate forest under drought pressure. In this study, birch (Betula platyphylla) and larch (Larix o...

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Autores principales:	Long Tan, Ruifeng Fan, Huifeng Sun, Shenglei Guo
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/96a0a530299a4b74bce82039909a05a6
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spelling	oai:doaj.org-article:96a0a530299a4b74bce82039909a05a62021-12-02T20:18:27ZRoot foraging of birch and larch in heterogeneous soil nutrient patches under water deficit.1932-620310.1371/journal.pone.0255848https://doaj.org/article/96a0a530299a4b74bce82039909a05a62021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0255848https://doaj.org/toc/1932-6203Water and nutrient are two critical factors that limit plant growth to spatial-temporal extents. Tree root foraging behavior has not received adequate attention in heterogeneous soil environments in temperate forest under drought pressure. In this study, birch (Betula platyphylla) and larch (Larix olgensis) seedlings were raised in pots in a split-root system with artificially heterogeneous soil environments to study the root foraging response to drought. Potted space was split into two halves where substrates were mixed with fertilizers in 67.5 mg nitrogen (N) plant-1 (N-P2O5-K2O, 14-13-13) to both halves as to create a homogeneous condition. Otherwise, a rate of 135 mg N plant-1 of fertilizers was delivered to a random half to create a heterogeneous condition. Half of seedlings were fully sub-irrigated every three days with the other half received the drought treatment by being watered every six days. Both birch and larch seedlings showed greater net shoot growth and biomass increment in well-watered condition, while root morphology was promoted by drought. Both species placed more fine roots with higher root N concentration in nutrient-enriched patches. In the heterogeneous pattern, birch showed a higher foraging precision assessed by biomass and greater foraging plasticity assessed in morphology and physiology. In contrast, larch seedlings had higher root N concentration in the well-watered condition. Neither species showed a significant response of N utilization to the heterogeneous pattern, but both used more N when water supply was improved. Overall, birch is better at acclimating to heterogeneous soil conditions, but its ability to seize N was lower than larch when drought was alleviated.Long TanRuifeng FanHuifeng SunShenglei GuoPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 8, p e0255848 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Long Tan Ruifeng Fan Huifeng Sun Shenglei Guo Root foraging of birch and larch in heterogeneous soil nutrient patches under water deficit.
description	Water and nutrient are two critical factors that limit plant growth to spatial-temporal extents. Tree root foraging behavior has not received adequate attention in heterogeneous soil environments in temperate forest under drought pressure. In this study, birch (Betula platyphylla) and larch (Larix olgensis) seedlings were raised in pots in a split-root system with artificially heterogeneous soil environments to study the root foraging response to drought. Potted space was split into two halves where substrates were mixed with fertilizers in 67.5 mg nitrogen (N) plant-1 (N-P2O5-K2O, 14-13-13) to both halves as to create a homogeneous condition. Otherwise, a rate of 135 mg N plant-1 of fertilizers was delivered to a random half to create a heterogeneous condition. Half of seedlings were fully sub-irrigated every three days with the other half received the drought treatment by being watered every six days. Both birch and larch seedlings showed greater net shoot growth and biomass increment in well-watered condition, while root morphology was promoted by drought. Both species placed more fine roots with higher root N concentration in nutrient-enriched patches. In the heterogeneous pattern, birch showed a higher foraging precision assessed by biomass and greater foraging plasticity assessed in morphology and physiology. In contrast, larch seedlings had higher root N concentration in the well-watered condition. Neither species showed a significant response of N utilization to the heterogeneous pattern, but both used more N when water supply was improved. Overall, birch is better at acclimating to heterogeneous soil conditions, but its ability to seize N was lower than larch when drought was alleviated.
format	article
author	Long Tan Ruifeng Fan Huifeng Sun Shenglei Guo
author_facet	Long Tan Ruifeng Fan Huifeng Sun Shenglei Guo
author_sort	Long Tan
title	Root foraging of birch and larch in heterogeneous soil nutrient patches under water deficit.
title_short	Root foraging of birch and larch in heterogeneous soil nutrient patches under water deficit.
title_full	Root foraging of birch and larch in heterogeneous soil nutrient patches under water deficit.
title_fullStr	Root foraging of birch and larch in heterogeneous soil nutrient patches under water deficit.
title_full_unstemmed	Root foraging of birch and larch in heterogeneous soil nutrient patches under water deficit.
title_sort	root foraging of birch and larch in heterogeneous soil nutrient patches under water deficit.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/96a0a530299a4b74bce82039909a05a6
work_keys_str_mv	AT longtan rootforagingofbirchandlarchinheterogeneoussoilnutrientpatchesunderwaterdeficit AT ruifengfan rootforagingofbirchandlarchinheterogeneoussoilnutrientpatchesunderwaterdeficit AT huifengsun rootforagingofbirchandlarchinheterogeneoussoilnutrientpatchesunderwaterdeficit AT shengleiguo rootforagingofbirchandlarchinheterogeneoussoilnutrientpatchesunderwaterdeficit
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Root foraging of birch and larch in heterogeneous soil nutrient patches under water deficit.

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