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1.
研究了NaCl胁迫对5个不同番茄品种的幼苗生长、果实可溶性糖含量及产量的影响.结果表明,盐胁迫抑制了番茄幼苗植株的生长,降低了幼苗的单株鲜重,减少了果实产量,但可以提高果实可溶性糖含量.同一盐胁迫条件下,不同番茄品种性状存在显著差异. 相似文献
2.
为了解亚菊(Ajania pallasiana)对盐胁迫环境的适应能力,以亚菊扦插苗为材料,采用盆栽试验的方法,在不同Na Cl浓度(0、100、200、300、400、500mmol/L)下,研究了亚菊的叶绿素含量、可溶性糖含量、脯氨酸含量、相对电导率、根系活力等生理指标变化。研究表明,在盐胁迫条件下,亚菊植株生长受到一定程度的抑制,可溶性糖和脯氨酸含量呈先升后降趋势;叶绿素含量和根系活力随盐胁迫强度的增强而下降;相对电导率含量随盐胁迫强度的增强而增加。说明亚菊对较低浓度的盐胁迫有较好的耐受性,而当盐浓度达到300 mmol/L以上时,其生长受到较大程度的抑制。 相似文献
3.
目的:研究硝酸钙胁迫下24-表油菜素内酯(EBR)对黄瓜幼苗抗氧化性能及可溶性蛋白表达的影响。方法:通过单因素随机区组设计,从其抗氧化性能及可溶性蛋白表达的变化来探讨EBR对硝酸钙胁迫下黄瓜幼苗的影响。结果:与对照相比,硝酸钙胁迫导致黄瓜幼苗的丙二醛含量及细胞膜透性显著提高了115.1%和105.6%,膜脂过氧化加剧,黄瓜根系中可溶性蛋白含量降低且至少有35种蛋白发生明显变化,而叶片的可溶性蛋白含量升高且至少有29种蛋白发生明显变化;而硝酸钙胁迫下喷施EBR后黄瓜幼苗的SOD、POD、CAT分别比单纯的硝酸钙胁迫增加了20.2%、20.3%、34.4%,并提高了其可溶性蛋白含量及其表达的变化幅度。结论:24-表油菜素内酯可通过调节硝酸钙胁迫下黄瓜幼苗抗氧化性、可溶性蛋白含量及其表达,进而降低其膜脂过氧化程度,以缓解硝酸钙胁迫对植株的伤害。 相似文献
4.
研究了在盐胁迫条件下外源水杨酸(SA)对水稻幼苗耐受性应答的影响.本研究以水稻为材料,用1 mmol/L的外源水杨酸对水稻幼苗叶片进行喷雾处理,静置24 h后,经SA处理后的水稻幼苗再经过100 mmol/L的NaCl胁迫处理0-48 h.结果表明,经外源水杨酸处理的水稻幼苗,能显著增强体内脯氨酸(Pro)、可溶性蛋白的含量以及超氧化物歧化酶(SOD)、过氧化物酶(POD)等保护酶的活性,显著降低丙二醛(MDA)的含量.表明在盐胁迫条件下,外源水杨酸能增强水稻幼苗自身抗氧化系统中酶的活性,减轻和缓解盐胁迫带来的伤害. 相似文献
5.
Wei-hong Sun Yong Wang Hua-gang He Xue Li Wan Song Bin Du Qing-wei Meng 《Journal of Zhejiang University. Science. B》2013,14(7):578-585
Ascorbate peroxidases are directly involved in reactive oxygen species (ROS) scavenging by reducing hydrogen peroxide to water. The tomato thylakoid-bound ascorbate peroxidase gene (StAPX) was introduced into tobacco. RNA gel blot analysis confirmed that StAPX in tomato leaves was induced by methylviologen-mediated oxidative stress. The sense transgenic seedlings exhibited higher tAPX activity than that of the wild type (WT) plants under oxidative stress conditions, while the antisense seedlings exhibited lower tAPX activity. Lower APX activities of antisense transgenic seedlings caused higher malondialdehyde contents and relative electrical conductivity. The sense transgenic seedlings with higher tAPX activity maintained higher chlorophyll content and showed the importance of tAPX in maintaining the optimal chloroplast development under methylviologen stress conditions, whereas the antisense lines maintained lower chlorophyll content than WT seedlings. Results indicated that the over-expression of StAPX enhanced tolerance to methylviologen-mediated oxidative stress in sense transgenic tobacco early seedlings, whereas the suppression of StAPX in antisense transgenic seedlings showed high sensitivity to oxidative stress. 相似文献
6.
以玉米为材料,研究水杨酸对盐渍条件下玉米幼苗生长的影响。结果表明,外源喷施一定浓度的水杨酸能够缓解幼苗盐害。表现为叶片叶绿素含量提高,光合作用能力增强,可溶性蛋白含量上升,叶片渗透势降低。同时,幼苗鲜重、干重增加。 相似文献
7.
以油菜品种＂美国巨荚油王＂为材料,采用室内水培实验研究了不同浓度SA处理对0.1mmol/LNaCl胁迫下油菜幼苗生长的影响.结果表明：盐胁迫下,油菜幼苗叶片内叶绿素含量及过氧化物酶活性明显降低,脯氨酸和丙二醛（MDA）含量明显增加.外施SA明显提高了盐胁迫下油菜幼苗叶片内叶绿素含量、过氧化物酶活性及脯氨酸含量,使膜脂过氧化产物MDA含量明显降低.外施SA可以缓解盐胁迫对幼苗生长的抑制作用,并以0.15mmol/L,0.2mmol/L SA缓解效果最好. 相似文献
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考察了壳聚糖叶面喷施、丁香提取液叶面喷施以及不同复配浓度的丁香壳聚糖复合剂叶面喷施方式对樱桃番茄苗期生理的影响。结果表明,丁香与壳聚糖复合剂处理可显著提高樱桃番茄苗期叶片的叶绿素、可溶性糖、可溶性蛋白、过氧化氢酶活性,过氧化物酶活性以及脯氨酸含量。确定了壳聚糖、丁香叶面喷施处理的最佳浓度配比。 相似文献
10.
为探讨大白菜幼苗耐热性生理机制,以5份大白菜为材料,进行高温处理,温度32℃,光照14 h,强度10 000 lx处理8 d,调查耐热性及鲜质量、干质量、可溶性糖质量分数、叶绿素质量分数、类胡萝卜素质量分数、根系活力的变化。结果表明,在常温下上述指标在材料间的差异不显著,经高温处理,在材料间的差异达显著水平,与对照相比较,鲜质量、干质量、可溶性糖质量分数、叶绿素质量分数、类胡萝卜素质量分数、根系活力下降,耐热性强的材料具有较高的鲜质量、干质量、可溶性糖质量分数、叶绿素质量分数、类胡萝卜素质量分数、根系活力,耐热性较低的材料表现相反。 相似文献
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12.
ABA和BR对葡萄果实花色素苷和可溶性糖含量的影响 总被引：5，自引：0，他引：5
以京亚、藤稔、山葡萄品种为试验材料,于果实转熟期用ABA、BR处理葡萄果穗,对果实花色素苷含量与可溶性糖含量及相关关系进行研究.结果表明,ABA和BR能特异地促进果皮中花色素苷的形成,增加可溶性糖的含量,有促进着色的效果,京亚、山葡萄两品种果皮花色素苷含量与果实内可溶性糖含量呈高度正相关. 相似文献
13.
壳聚糖对水分胁迫下青稞幼苗部分生理指标的影响 总被引：1，自引：0，他引：1
以青稞为实验材料,通过水培实验法探究了不同浓度壳聚糖（CTS）预处理对12％聚乙二醇（PEG）胁迫下青稞幼苗部分生理指标的影响．结果显示,12％PEG胁迫下青稞幼苗叶片含水量、叶绿素相对含量和可溶性蛋白含量均下降,经适宜浓度的CTS预处理,能在一定程度上抑制青稞幼苗含水量的下降,提高叶绿素相对含量和可溶性蛋白含量．因此,适宜浓度的壳聚糖可以增强青稞幼苗的抗旱能力,减轻水分胁迫对青稞幼苗造成的伤害． 相似文献
14.
2012年全球镉产量已增至2.3万t,镉污染对人类的伤害日趋严重。在芥菜型油菜（Brassica juncea）晋油6号、川油A-6和内引I号中,筛选出一个对重金属镉有较强耐受力的品种。水培条件下,利用不同浓度的外源镉对油菜幼苗进行处理,研究镉胁迫对芥菜型油菜幼苗叶绿素和丙二醛（MDA）含量、可溶性蛋白质浓度以及过氧化氢酶（CAT）活性的影响。3个参试品种中,晋油6号对重金属镉的耐受力最强。随着镉处理浓度的增大,晋油6号叶绿素含量的降低最为缓和,丙二醛的增长量最低,且通过产生新的可溶性蛋白质和提高过氧化氢酶活性来抵御逆境的能力最强。晋油6号在作为镉污染修复的植物材料上具有应用价值。 相似文献
15.
0．1～0．4mmol／LCa~(2 )能有效地促进杂交水稻幼苗的生长；提高叶片中的叶绿素含量和净光合作用速率，以及植株中的可溶性淀粉和蛋白质含量；降低叶片中的可溶性糖含量；增加植株的有效穗、结实率、千粒重和谷产量．当Ca~(2 )浓度超过0．4mmol／L时，则促进作用减弱． 相似文献
16.
不同氮肥水平下烯效唑对小麦可溶性糖和淀粉含量的影响 总被引：2，自引：0，他引：2
试验采用两因素裂区设计研究了不同氮肥水平下烯效唑对小麦可溶性糖和淀粉含量的影响。结果表明:烯效唑虽然降低了单位重量(g)中的淀粉含量,但增加了旗叶中可溶性糖的输出率,有力地保证了籽粒灌浆物质的来源,最终运输到籽粒中的碳素绝对量有所增加,因此淀粉产量增加。 相似文献
17.
Yun Wu Yi-ping Xia Jia-ping Zhang Fang Du Lin Zhang Yi-di Ma Hong Zhou 《Journal of Zhejiang University. Science. B》2016,17(11):892-904
Bulblet development is a problem in global lily bulb production and carbohydrate metabolism is a crucial factor. Micropropagation acts as an efficient substitute for faster propagation and can provide a controllable condition to explore bulb growth. The present study was conducted to investigate the effects of humic acid (HA) on bulblet swelling and the carbohydrate metabolic pathway in Lilium Oriental Hybrids ‘Sorbonne’ under in vitro conditions. HA greatly promoted bulblet growth at 0.2, 2.0, and 20.0 mg/L, and pronounced increases in bulblet sucrose, total soluble sugar, and starch content were observed for higher HA concentrations (≥2.0 mg/L) within 45 d after transplanting (DAT). The activities of three major starch synthetic enzymes (including adenosine 5′-diphosphate glucose pyrophosphorylase, granule-bound starch synthase, and soluble starch synthase) were enhanced dramatically after HA application especially low concentration HA (LHA), indicating a quick response of starch metabolism. However, higher doses of HA also caused excessive aboveground biomass accumulation and inhibited root growth. Accordingly, an earlier carbon starvation emerged by observing evident starch degradation. Relative bulblet weight gradually decreased with increased HA doses and thereby broke the balance between the source and sink. A low HA concentration at 0.2 mg/L performed best in both root and bulblet growth. The number of roots and root length peaked at 14.5 and 5.75 cm, respectively. The fresh bulblet weight and diameter reached 468 mg (2.9 times that under the control treatment) and 11.68 mm, respectively. Further, sucrose/starch utilization and conversion were accelerated and carbon famine was delayed as a result with an average relative bulblet weight of 80.09%. To our knowledge, this is the first HA application and mechanism research into starch metabolism in both in vitro and in vivo condition in bulbous crops. 相似文献
18.
测定了经空间飞行处理和地面存留的番茄种子（ESE、EBS）和幼苗中活性氧代谢的某些指标．结果表明，SES和EBS之间的活性氧代谢存在明显的差异．SES可溶性蛋白质含量和SOD活性高于EBS．SES及其幼苗表现出比EBS较强的代谢强度，在萌发的起始阶段尤其如此．SES幼苗中的SOD活性和SES活性高于EBS，而MDA含量和产生速率比EBS低得多．以上结果提示，SES中保卫酶系统活性的增加，对于促进种子吸胀和萌发阶段膜结构的修复，维持膜结构的完整性以致提高种子的活力可能具有重要的意义． 相似文献
19.
乙烯对盐胁迫过程中玉米种子活力和超氧化物岐化酶活性的影响 总被引：3，自引：0，他引：3
通过研究乙烯对盐胁迫中玉米种子活力、幼苗生长及SOD活性的影响，发现外源乙烯可提高盐胁迫下两品种玉米种子活力和SOD活性，但幼苗鲜重和高度低于对照，表明盐胁迫中乙烯通过提高玉米种子活力和SOD活性，且使生长受到抑制来增加玉米的抗盐性． 相似文献
20.
Qian-nan Diao Yong-jun Song Dong-mei Shi Hong-yan Qi 《Journal of Zhejiang University. Science. B》2016,17(12):916-930
Polyamines (PAs) and nitric oxide (NO) are vital signals in modulating plant response to abiotic stress. However, to our knowledge, studies on the relationship between NO and PAs in response to cold stress in tomato are limited. Accordingly, in this study, we investigated the effects of putrescine (Put) and spermidine (Spd) on NO generation and the function of Spd-induced NO in the tolerance of tomato seedling under chilling stress. Spd increased NO release via the nitric oxide synthase (NOS)-like and nitrate reductase (NR) enzymatic pathways in the seedlings, whereas Put had no such effect. Moreover, H2O2 might act as an upstream signal to stimulate NO production. Both exogenous NO donor (sodium nitroprusside (SNP)) and Spd enhanced chilling tolerance in tomato, thereby protecting the photosynthetic system from damage. Compared to chilling treatment alone, Spd enhanced the gene expressions of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX), and their enzyme activities in tomato leaves. However, a scavenger or inhibitor of NO abolished Spd-induced chilling tolerance and blocked the increased expression and activity due to Spd of these antioxidant enzymes in tomato leaves under chilling stress. The results showed that NO induced by Spd plays a crucial role in tomato’s response to chilling stress. 相似文献