干旱区生态环境知识资源中心(Arid): Genotypic and seasonal variation in root depth development during establishment of C-4 perennial grass ecotypes

Arid

DOI	10.1071/CP21258
	Genotypic and seasonal variation in root depth development during establishment of C-4 perennial grass ecotypes
	Huot, Chanthy; Philp, Joshua N. M.; Zhou, Yi; Denton, Matthew D.
通讯作者	Zhou, Y (corresponding author), Univ Adelaide, Sch Agr Food & Wine, Waite Campus, Urrbrae, SA 5064, Australia.
来源期刊	CROP & PASTURE SCIENCE
ISSN	1836-0947
EISSN	1836-5795
出版年	2021
英文摘要	Context. Perennial forage grass species are often grown with limited water following establishment and rely on accessing water deep in the soil profile to survive. Aim, This study aimed to characterise bermudagrass (Cynodon spp.) genotypes with rapid vertical root growth associated with post-establishment survival. Methods. Twelve bermudagrasses representing genotypes from diverse climate zones in Australia were established in rhizotrons to analyse the stability in genotypic variation in root and shoot growth in winter and summer experiments. Genotypic rank of root length, leaf area, and root dry weight were consistent in both seasons. Key results. Bermudagrass genotypes exhibited different traits correlated with root vertical growth rate and inconsistency of genotypic rank of shoot growth. During winter establishment, the rate of root depth development (RRDD) (r = -0.64) was correlated with the proportion of root length that became inactive, that was likely due to seasonal root death in winter conditions; during summer establishment, RRDD was correlated with tiller appearance rate (r = 0.45) and root distribution to 10 cm depth (r = -0.62). Shoot dry weight was correlated with photosynthesis (r = 0.85) and transpiration (r = 0.79) in summer, but not in winter. RRDD (r = 0.75, winter and r = 0.77, summer) was correlated with drought resistance index, previously analysed under field conditions. Conclusions and implications. Genotypes from the Mediterranean climates in Australia showed rapid growth of roots and shoots in both seasons and have the greatest potential for broader application for forage production in variable environments.
英文关键词	arid pastures Bermuda grass drought resistance forage management root depth development seasonal growth turfgrass winter dormancy
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000718807000001
WOS关键词	BERMUDAGRASSES CYNODON SPP. ; X ENVIRONMENT INTERACTION ; TIFTON 85 BERMUDAGRASS ; DROUGHT RESISTANCE ; BIOMASS PRODUCTION ; NUTRITIVE-VALUE ; PLANT-GROWTH ; WATER-USE ; TRAITS ; TEMPERATURE
WOS类目	Agriculture, Multidisciplinary
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367656
作者单位	[Huot, Chanthy; Philp, Joshua N. M.; Zhou, Yi; Denton, Matthew D.] Univ Adelaide, Sch Agr Food & Wine, Waite Campus, Urrbrae, SA 5064, Australia; [Huot, Chanthy] Royal Univ Agr, Ctr Livestock Dev Studies, Phnom Penh 12401, Cambodia
推荐引用方式 GB/T 7714	Huot, Chanthy,Philp, Joshua N. M.,Zhou, Yi,et al. Genotypic and seasonal variation in root depth development during establishment of C-4 perennial grass ecotypes[J],2021.
APA	Huot, Chanthy,Philp, Joshua N. M.,Zhou, Yi,&Denton, Matthew D..(2021).Genotypic and seasonal variation in root depth development during establishment of C-4 perennial grass ecotypes.CROP & PASTURE SCIENCE.
MLA	Huot, Chanthy,et al."Genotypic and seasonal variation in root depth development during establishment of C-4 perennial grass ecotypes".CROP & PASTURE SCIENCE (2021).