Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/gcbb.12322 |
Xylem morphology determines the drought response of two Arundo donax ecotypes from contrasting habitats | |
Haworth, Matthew1; Centritto, Mauro1; Giovannelli, Alessio1; Marino, Giovanni1; Proietti, Noemi2; Capitani, Donatella2; De Carlo, Anna1; Loreto, Francesco3 | |
通讯作者 | Haworth, Matthew |
来源期刊 | GLOBAL CHANGE BIOLOGY BIOENERGY
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ISSN | 1757-1693 |
EISSN | 1757-1707 |
出版年 | 2017 |
卷号 | 9期号:1页码:119-131 |
英文摘要 | Arundo donax exhibits rapid growth and requires little nutrient input, making it an ideal perennial biomass crop species. However, this growth is accompanied by high rates of water use, potentially restricting the use of A. donax in rain-fed marginal lands. Here, we investigated the physiological and morphological responses to drought in two ecotypes of A. donax from contrasting habitats: one from an arid environment in Morocco, and the second from a warm humid sub-Mediterranean climate in central Italy. Prolonged drought resulted in identical reductions in leaf-level photosynthesis (P-N) and stomatal conductance (G(s)) in the two ecotypes. However, water deficit induced an increase in xylem vessel diameter in the Moroccan plants, improving the movement of water along the stem, but also likely reducing the resistance to embolism. In contrast, the Italian ecotype reduced xylem vessel area, thus increasing resistance to water transport and xylem embolism. The increased xylem vessel size and associated vulnerability to embolism in the Moroccan plants may have contributed to an increase in the loss of leaf numbers, but also to higher relative water content (RWC) in the remaining leaves in comparison to the Italian ecotype, where a greater number of leaves persisted. Despite the Moroccan plants possessing stems with a lower basal area than their Italian counterparts, both ecotypes exhibited identical leaf to supporting stem area ratios under both control and water deficit conditions. This may account for the similarities observed in leaf area measures of P-N and G(s) in this and previous studies of different A. donax ecotypes. Selection of A. donax ecotypes on the basis of xylem responses to drought may facilitate the development of varieties suited to arid environments prone to severe drought and wetter habitats where prolonged droughts occur less frequently. |
英文关键词 | biomass giant reed hydraulic conductivity marginal lands photosynthesis stomatal conductance xylem embolism |
类型 | Article |
语种 | 英语 |
国家 | Italy |
收录类别 | SCI-E |
WOS记录号 | WOS:000390216800010 |
WOS关键词 | WATER-USE EFFICIENCY ; CARBON-ISOTOPE DISCRIMINATION ; LEAF GAS-EXCHANGE ; GIANT REED ; HYDRAULIC CONDUCTANCE ; PHOTOSYNTHETIC CAPACITY ; STOMATAL CONDUCTANCE ; WOODY-PLANTS ; L. CLONES ; MEDITERRANEAN ENVIRONMENT |
WOS类目 | Agronomy ; Biotechnology & Applied Microbiology ; Energy & Fuels |
WOS研究方向 | Agriculture ; Biotechnology & Applied Microbiology ; Energy & Fuels |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/199368 |
作者单位 | 1.Natl Res Council CNR IVALSA, Tree & Timber Inst, Via Madonna del Piano 10 Sesto Fiorentino, I-50019 Florence, Italy; 2.Natl Res Council CNR IMC, Inst Chem Methodol, Area Ric Roma 1,Via Salaria Km 29,300, I-00015 Rome, Italy; 3.Natl Res Council CNR DiSBA, Dept Biol Agr & Food Sci, Piazzale Aldo Moro 7, I-00185 Rome, Italy |
推荐引用方式 GB/T 7714 | Haworth, Matthew,Centritto, Mauro,Giovannelli, Alessio,et al. Xylem morphology determines the drought response of two Arundo donax ecotypes from contrasting habitats[J],2017,9(1):119-131. |
APA | Haworth, Matthew.,Centritto, Mauro.,Giovannelli, Alessio.,Marino, Giovanni.,Proietti, Noemi.,...&Loreto, Francesco.(2017).Xylem morphology determines the drought response of two Arundo donax ecotypes from contrasting habitats.GLOBAL CHANGE BIOLOGY BIOENERGY,9(1),119-131. |
MLA | Haworth, Matthew,et al."Xylem morphology determines the drought response of two Arundo donax ecotypes from contrasting habitats".GLOBAL CHANGE BIOLOGY BIOENERGY 9.1(2017):119-131. |
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