干旱区生态环境知识资源中心(Arid): Cytokinin-like activity of some species of Rhodophyta from tropical and subtropical waters

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DOI	10.1007/s10811-023-03083-z
	Cytokinin-like activity of some species of Rhodophyta from tropical and subtropical waters
	Yokoya, Nair S.; Stirk, Wendy A.; van Staden, Johannes
通讯作者	Yokoya, NS
来源期刊	JOURNAL OF APPLIED PHYCOLOGY
ISSN	0921-8971
EISSN	1573-5176
出版年	2024
卷号	36 期号:2 页码:757-764
英文摘要	The use of seaweed extracts as biostimulants is increasing worldwide to improve agricultural production, since they are natural and environmentally friendly compounds. Seaweeds biosynthesize plant hormones, including cytokinins which play an important role in plant growth and development. Cytokinin-like (CK) activity was analysed in eight species of Rhodophyta, including agarophytes (Gracilaria spp., Gelidium), and carrageenophytes (Chondracanthus, Hypnea). Comparison of CK-activity of different samples of the same species (e.g., field and cultured samples, different color and morphological variants, and reproductive phases) is described. Dried samples were extracted for 24 h at 10(degrees)C in 100 mL 80% ethanol, filtered and rinsed with 80% ethanol. The extracts were purified using C18 Sep-Pak cartridges and Oasis MCX columns and separated into fractions by descending paper chromatography. CK-like activity was determined using the soybean callus bioassay with activity compared to kinetin standards (1, 5, 10 and 50 mu g L-1). The green strain of Hypnea psedomusciformis was more active than the brown strain with most activity co-chromatographing with zeatin. Tetrasporophytes and female gametophytes of Gracilaria birdiae had CK-like activity that co-chromatographed with zeatin, and female gametophytes had an additional peak that co-chromatographed with riboside-5'-monophosphate. The highest CK-like activity (equivalent to 50 mu g L-1 kinetin) occurred in G. cervicornis which co-chromatographed with isopentenyladenosine. Morphological variants of Hypnea had similar CK-like activity but the nigrescens variant had higher activity (equivalent to 10 mu g L-1 kinetin) than the musciformis variant. These results indicate that Gracilaria cervicornis and Hypnea pseudomusciformis (nigrescens variant) have potential as biostimulants in agriculture.
英文关键词	Cytokinins Gracilaria Hypnea Kinetin Rhodophyta Soybean callus bioassay
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001065090800004
WOS关键词	PLANT-GROWTH REGULATORS ; ENDOGENOUS CYTOKININS ; ABSCISIC-ACID ; LUNAR PERIODICITY ; CALLUS FORMATION ; GRACILARIALES ; MORPHOGENESIS ; REGENERATION ; EXTRACT ; QUALITY
WOS类目	Biotechnology & Applied Microbiology ; Marine & Freshwater Biology
WOS研究方向	Biotechnology & Applied Microbiology ; Marine & Freshwater Biology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404332
推荐引用方式 GB/T 7714	Yokoya, Nair S.,Stirk, Wendy A.,van Staden, Johannes. Cytokinin-like activity of some species of Rhodophyta from tropical and subtropical waters[J],2024,36(2):757-764.
APA	Yokoya, Nair S.,Stirk, Wendy A.,&van Staden, Johannes.(2024).Cytokinin-like activity of some species of Rhodophyta from tropical and subtropical waters.JOURNAL OF APPLIED PHYCOLOGY,36(2),757-764.
MLA	Yokoya, Nair S.,et al."Cytokinin-like activity of some species of Rhodophyta from tropical and subtropical waters".JOURNAL OF APPLIED PHYCOLOGY 36.2(2024):757-764.