Seed treatments to overcome salt and drought stress during germination in sunflower (Helianthus annuus L.)
Seed treatments to overcome salt and drought stress during germination in sunflower (Helianthus annuus L.)
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DOI：
10.1016/j.eja.2005.08.001
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发表时间：
2006-05-01
影响因子：
5.2
通讯作者：
Kolsarici, Ö
中科院分区：
文献类型：
--
作者：
Kaya, MD;Okçu, G;Kolsarici, Ö
以向日葵（Helianthus annuus L.）品种Sanbro在萌发和幼苗生长时评价PEG-6000诱导的盐（NaCl）和干旱条件下在相同的0.0，-0.3的水势下的耐受性。-0.6、-0.9和-1.2 MPa。NaCl溶液的电导率（EC）值分别为0.0、6.5、12.7、18.4和23.5 dS m（-1）。本研究的目的是确定因素负责发芽和早期幼苗生长，由于盐毒或渗透效应，并优化最佳的引发处理，这些胁迫conditions.Results结果显示，发芽延迟在两种解决方案，具有不同的引发处理发芽。在相同水势下，NaCl处理的种子发芽率、根长和芽长均高于PEG处理，而平均发芽时间和畸形发芽率低于PEG处理。种子能够在所有浓度的NaCl下萌发，但在-1.2MPa的PEG处理下没有观察到种子萌发。NaCl对幼苗生长的抑制作用小于稀发芽。因此，在相同的水势下，MCL和PEG对种子萌发的抑制作用是由渗透作用引起的，而不是盐毒作用。水引发增加盐和干旱胁迫下的发芽和幼苗生长。(c)2005 Elsevier B. V.保留所有权利。
The treated seeds (control, KNO3 and hydropriming) of sunflower (Helianthus annuus L.) cultivar Sanbro were evaluated at germination and seedling growth for tolerance to salt (NaCl) and drought conditions induced by PEG-6000 at the same water potentials of 0.0, -0.3. -0.6, -0.9 and -1.2 MPa. Electrical conductivity (EC) values of the NaCl solutions were 0.0, 6.5, 12.7, 18.4 and 23.5 dS m(-1), respectively. The objective of the study was to determine factors responsible for germination and early seedling growth due to salt toxicity or osmotic effect and to optimize the best priming treatment for these stress conditions.Results revealed that germination delayed in both Solutions, having variable germination with different priming treatments. Germination, root and shoot length were higher but mean germination time and abnormal germination percentage were lower in NaCl than PEG at the same water potential. Seeds were able to germinate at all concentrations of NaCl but no seed germination was observed at -1.2 MPa of PEG treatments. NaCl had less inhibitor effect on seedling growth than thin germination. It was concluded that inhibition of germination at the same water potential of MCL and PEG resulted from osmotic effect rather than salt toxicity. Hydropriming increased germination and seedling growth under salt and drought stresses. (c) 2005 Elsevier B.V. All rights reserved.