Yield and Pest Performance of High-Temperature Tolerant Tomato (Lycopersicon esculentum) Lines for Year-Round Tomato Production in Bangladesh

The study was conducted at Olericulture Division, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh during summer season of 2021 to see the performances of yield and yield-related components of twelve heat tolerant tomato hybrids. Significant variation was expressed for days to first harvest (101.0 - 108.0 days), while maximum number of fruits per plant was calculated in F1 2101 and F1 2201 (9.5), followed by F1 203, F1 2001, F1 2303, F1 2401 (9.0). The highest single fruit weight was estimated in F1 2501 (195.5 g), followed by F1 2101 (119.0 g), F1 2201 (113.8 g), while the range was 33.1 - 195.5 g. The range of fruit yield was 7.9 - 38.7 t/ha, while higher-yielding hybrids were viz., F1 203 (27.7 t/ha), F1 2101 (35.5 t/ha), F1 2201 (33.9 t/ha) and F1 2501 (28.7 t/ha). Maximum TSS was produced by F1 2501 (5.9%), followed by BARI Hybrid Tomato-8 (5.1%), F1 1101, F1 1903 (5.0%), with a range of 4.0% - 5.9%, while TYLCV infection and leaf sucking pest infestation varied from 0.0% - 10.0% and 3.3% - 16.7%, respectively. Thus, based on the performances of different yield and yield contributing traits, the hybrids, viz., F1 2101, F1 2201, F1 2501 may be selected to develop heat tolerant tomato hybrid varieties for the farmers of sub-tropical regions.

Microclimate modification using eco-friendly nets and floating row covers improves tomato (<i>Lycopersicon esculentum</i>) yield and quality for small holder farmers in East Africa

Tomato (Lycopersicon esculentum) is one of the important vegetables in supplying vitamins, minerals and fiber to human diets worldwide. Its successful production in the tropics is, however, constrained by environmental variations especially under open field conditions. Two trials were conducted at the Horticulture Research and Teaching Field, Egerton University, Kenya to evaluate the effects of agricultural nets (agronets) herein called eco-friendly nets (EFNs) and floating row covers (FRCs) on microclimate modification, yield, and quality of tomato. A randomized complete block design with five replications was used. Tomato plants were grown under fine mesh EFN (0.4-mm pore diameter) cover, large mesh EFN (0.9-mm pore diameter) cover or FRC. The EFN and FRC were maintained either permanently closed or opened thrice a week from 9 am to 3 pm. Two open control treatments were used: unsprayed (untreated control) or sprayed with chemicals (treated control). The use of EFN or FRC modified the microclimate with higher temperatures, lower diurnal temperature ranges, and higher volumetric water content recorded compared with the controls. On the other hand, light quantity and photosynthetic active radiation were reduced by the use of EFN and FRC compared with the controls. The use of FRC and EFN resulted in more fruit and higher percent in marketable yield compared with open field production. Fruit quality at harvest was also significantly improved by the use of EFN and FRC. Fruits with higher total soluble solids (TSS), lower titratable acidity (TA), and higher sugar acid ratio were obtained in EFN and FRC treatments compared with the controls. Fruits harvested from EFN and FRC were also firmer compared with control fruits. These findings demonstrate the potential of EFN and FRC in modifying microclimate conditions and improving yields and quality of tomato under tropical field conditions.

The Effect of Water Hyacinth (<i>Eichhornia crassipes</i>) Compost on Tomato (<i>Lycopersicon esculentum</i>) Growth Attributes, Yield Potential and Heavy Metal Levels

The potential of different water hyacinth compost application rates in influencing growth attributes, yield and heavy metal accumulation of lead (Pb), copper (Cu), nickel (Ni) and zinc (Zn) in tomato fruit was studied in Masvingo. Four treatments of water hyacinth compost rates of 0, 37, 55.6 and 74.1 t·ha-1 were each replicated three times and applied in a randomized complete block design set up. Results showed that water hyacinth compost application rates significantly affected plant height, days to maturity and yield but had no influence on the number of tomato fruits per plant. The plant height at application rate of 74.1 t·ha-1 was 25%, 56% and 63% higher than the control at week 6, 9 and 12, respectively. At application rates of 56.6 t·ha-1, plant heights were 11%, 13% and 12% higher than the control whilst marginal plant height differences of -4%, 6% and 4% were recorded between application rate of 34.7 t·ha-1 and the control at week 6, 9 and 12, respectively. Tomato plants under compost rates of 34.7, 56.6 and 74.1 t·ha-1 in comparison to the control delayed maturity by 10, 17 and 20 days, respectively. Yields of 52, 55, 60 and 68 t·ha-1 were realized from hyacinth compost rates of 0, 34.7, 56.6 and 74.1 t·ha-1, respectively. Heavy metal concentrations increased with increase in the water hyacinth compost rate but at all application rates, the average concentrations were 85%, 93% and 86% lower than the Codex Alimentarious Commission permissible levels for Pb, Cu and Zn. Water hyacinth compost at a rate of 74 t·ha-1 therefore can be used for increased tomato yield without exposing consumers to heavy metal toxicity.

外源NO与蔗糖对盐胁迫下番茄(Lycopersicon esculentum Mill)幼苗氧化损伤的保护效应

选取长至6～8片真叶的健康番茄（Lycopersicon esculentum Mill）幼苗,分别进行蔗糖、硝普钠（sodium nitropresside,SNP,作为外源NO供体）及其体积比例组合（1∶1）处理;36h后施以NaCl胁迫,并分别于0h（胁迫前）、24h、48h和72h取样,进行相关生理生化指标测定。具体5个实验处理如下：A.蒸馏水（CK）;B.100 mmol/L NaCl;C.0.1 mmol/L SNP＋100 mmol/L NaCl;D.0.1 mmol/L SNP＋1.0mmol/L蔗糖＋100 mmol/L NaCl;E.1.0 mmol/L蔗糖＋100 mmol/L NaCl。结果表明：与SNP和蔗糖单独处理相比,二者组合处理对缓解盐胁迫下番茄幼苗的氧化损伤存在正协同效应,主要表现在进一步增强了番茄幼苗超氧化物歧化酶（SOD）、过氧化物酶（POD）、过氧化氢酶（CAT）、抗坏血酸过氧化物酶（APX）和谷胱甘肽还原酶（GR）的活性;提高了脯氨酸（Pro）的含量,同时膜脂过氧化产物丙二醛（MDA）含量显著降低（P〈0.05）。采用聚丙烯酰胺浓度梯度凝胶电泳对盐胁迫24 h和48 h材料的POD同功酶检测表明,当NaCl单独处理时,番茄幼苗叶片POD同功酶第V条带缺失,其它谱带酶量减少,抑制了POD同功酶的表达;SNP和蔗糖单独处理能够保护盐胁迫（24、48h）所导致的POD同功酶条带的完整;而组合处理既保证了POD同功酶条带的完整,又加强了酶量的表达。随着盐胁迫时间的延长,其氧化损伤程度愈烈,SNP和蔗糖组合处理能够更有效地缓解盐胁迫对番茄幼苗植株造成的氧化损伤。

控释肥联合养分增效剂显著提高番茄产量与品质

采用田间试验,以番茄(Lycopersicon esculentum Mill.)品种瑞菲为试验材料,通过控释肥联合养分增效剂探究其对番茄生长、产量与品质的影响。结果表明,控释肥联合养分增效剂能显著增加植株茎粗(P<0.05);与常规施肥相比,控释肥和控释肥联合养分增效剂可显著改善番茄品质,番茄果实可溶性固形物含量有增加的趋势,可溶性糖含量、维生素C含量显著提高(P<0.05),番茄果实色泽度和硬度均有所改善;与常规施肥相比,控释肥和控释肥联合养分增效剂能有效提高番茄产量与经济效益,产量分别增加12.7%和29.2%,净利润分别增加3.65万元/hm^(2)和7.72万元/hm^(2)。综上,控释肥联合养分增效剂可实现番茄增产增效,在实现轻简化生产中具有重要的实践价值。

Effects on Sucrose Metabolism,Dry Matter Distribution and Fruit Quality of Tomato Under Water Deficit

Four irrigation treatments were designed with 2,4,6 and 8 d intervals to irrigate, respectively. Watering was stopped when the reading of the moisture tension sensor reached zero. The results indicated that glucose and fructose content of tomato's fruit were increased but sucrose content was decreased with fruit growth and development. In different stages, carbohydrate content of tomato fruit in the treatment 3 was the highest, in the treatment 2 was higher, and in the other treatments was the lowest. SS(sucrose synthase)activity was decreased but SPS(sucrose phosphate synthase)activity was increased with development of tomato. SS and SPS activity were increased but acid invertase and neutral invertase activity of ripe stage were decreased under deficit irrigation. Glucose and fructose content were increased in leaves of tomato under water deficit. Soluble sugars, organic acid and the ratio of sugar/acid in tomato fruits were increased and dry matter accumulation of plant was enhanced under water deficit. But the growth of fruits upside the plant and its dry matter accumulation were badly affected under water stress.

番茄(Lycoqersicon esculentum Mill)小孢子发生及其雄配子体发育的细胞学观察

番茄小孢子的发生从孢原细胞开始,经过造孢细胞,小孢子母细胞、四分体、小孢子、雄配子体等发育阶段,最后形成二核花粉.番茄的绒毡层细胞是由初生壁细胞衍生的同型的双核细胞,正常情况下在减数分裂时期至四分体时期同步溶解.番茄的绒毡层为"变形绒毡层"类型,即溶解后的绒毡层要形成周原质团流入药室.番茄小孢子母细胞的减数分裂为同时型,在减数第一次分裂后不立即形成细胞壁,而是形成一个双核细胞;第二次分裂中,两个核同时进行分裂,其方向互为垂直,当分裂完成时,在四个核之间产生细胞壁,分隔成一个呈正四面体形的四分体.新形成的小孢子有浓厚细胞质和一个位于中央的细胞核.小孢子进一步发育形成明显的细胞壁,增大体积,细胞核被挤向一侧,在贴近细胞壁的位置上细胞核进行有丝分裂.分裂的结果形成两个子核:生殖核和营养核,两核之间最初由一弧形细胞板分隔成两个不等的细胞.番茄小孢子的发育基本是同步的,大多数小孢子都能发育成正常的成熟花粉.

Response of Tomato Plants to a New Application Method of Polyolefin-Coated Fertilizer

The response of tomato (Lycopersicon esculentum) plants basically fertilized with 0.3 g N per plant of compound fertilizer with a N:P2O5:K2O ratio of 20:10:20 to sticks of polyolefin-coated fertilizer (POCF) (Long70 with a N:P2O5:K2O ratio of 14:12:14) applied 23 d after transplanting was investigated using rooting boxes in the greenhouse. The results at 26 and 40 d after stick fertilizer treatment showed that the use of the stick fertilizer greatly increased the production of many new fine roots from the tomato plants. Compared to the unfertilized control, root length and root length density in the stick fertilizer treatment increased by 3.6-6.7 fold. In the soil zones near the stick fertilizer, root weight and root mass density were also significantly higher for the stick fertilizer treatment. Additionally, the use of the stick fertilizer increased the N, P and K concentrations in the leaves and stems of the tomato plants. The new fine roots growing near the stick fertilizer not only absorbed more nutrients and translocated them to the shoots, but also contained more nutrients within themselves. The soil ammonium and nitrate N data showed that N released from the stick fertilizer played a major role in inducing the production of new fine roots. These results indicated that stick fertilizer could be used as an alternative to the co-situs application technique to change and control the root distribution of crops as well as to increase the potential capacity of roots for water and nutrient absorption.

化肥减量配施微生物菌肥对圣女果产量、品质及土壤肥力的影响

研究化肥减量配施微生物菌肥对大田圣女果产量、品质及土壤肥力的影响,探讨适宜的施用量,为实现圣女果“化肥减量增效”的绿色产业目标提供依据。设置不施用肥料(CK)、100%化肥处理(SI)、100%微生物菌肥(SM)、化肥减量50%+25%微生物菌肥(MC1)、化肥减量50%+50%微生物菌肥(MC2)和化肥减量50%+100%微生物菌肥(MC3)6个处理,分析土壤养分、微生物数量和酶活性,测定圣女果品质相关的甜度和维生素C(Vc)、硝酸盐、还原糖、粗蛋白质和粗灰分含量指标,并统计圣女果果实产量。结果表明:与SI处理相比,(1)MC1、MC2和MC3处理显著提高了土壤有机质、全氮、全磷和碱解氮含量,增幅分别为11.9%~23.7%、7.8%~22.5%、2.7%~27.4%和10.2%~51.8%。(2)MC2和MC3处理中细菌、放线菌、固氮菌和酵母菌数量分别增加了10.6%~18.0%、7.1%~11.8%、28.9%~41.3%和13.3%~18.7%,而真菌减少11.4%~28.1%。(3)MC1、MC2、MC3和SM处理增强了土壤脲酶、蔗糖酶、过氧化氢酶和酸性磷酸酶活性,MC1、MC2和MC3处理的增幅分别为8.5%~28.7%、17.3%~80.7%、6.1%~45.1%和33.3%~110%;SM处理的增幅分别为16.1%、59.3%、30%和85.3%。(4)MC1、MC2和MC3处理可有效降低圣女果果实中的硝酸盐含量,降幅为18.2%~36.6%,而提高了Vc含量,增幅为16.5%~21.7%;SM处理圣女果果实中Vc、还原糖和粗蛋白质含量分别增加了16.9%、34.6%和23.5%,而硝酸盐积累量下降了59.72%。(5)MC1、MC2和MC3处理增收6900~17400元/hm2,其中MC2处理经济效益最高。总之,在圣女果生产中,化肥减量配施微生物菌肥改善了土壤肥力及圣女果品质,促进了圣女果增产增收,降低了生产成本;化肥减量配施微生物菌肥具有较好的经济和生态效益,化肥减量50%+50%微生物菌肥模式较好。

Incorporation of Resistance Gene into Tomato using Binary Vector System

ＩｎｃｏｒｐｏｒａｔｉｏｎｏｆＲｅｓｉｓｔａｎｃｅＧｅｎｅｉｎｔｏＴｏｍａｔｏｕｓｉｎｇＢｉｎａｒｙＶｅｃｔｏｒ ＳｙｓｔｅｍＺＨＡＯＳｈｕ－ｈｕｉ（赵淑慧）；ＸＵＥＧｕｏ－ｘｉｏｎｇ（薛国雄）（ＩｎｓｔｉｔｕｔｅｏｆＤｅｖｅｌｏｐｍｅｎｔａｌＢｉｏ...

番茄枯萎病对植株维管束危害及抗氧化系统影响的研究

为了在早期诊断和确定番茄枯萎病的发生,本文采用溶液培养方法研究了番茄(Lycopersicon escu-lentum Miller)幼苗剪根接种不同浓度枯萎病菌后染病植株维管束受害程度和抗氧化系统的响应。试验设4个病原菌梯度处理,B1(104cfu.mL 1)、B2(106cfu.mL 1)、B3(107cfu.mL 1)、B4(108cfu.mL 1),以不接病原菌为对照;分别在接种病原菌后4 d、8 d、12 d、16 d、20 d测定维管束褐变情况和抗氧化系统的变化。结果表明,在水培条件下,接种病原菌16 d植株维管束出现褐变,其受害程度随病原菌接种浓度提高而增大;维管束中病原菌只在B4处理中有检出。番茄叶片中丙二醛(MDA)含量随接种时间呈先降后升趋势,12 d开始逐渐上升,20 d达到最高,各接菌处理均显著高于对照,且B4处理显著高于其他处理;过氧化物酶(POD)活性先缓慢下降,12 d后回升,B4则急剧上升;多酚氧化酶(PPO)活性逐渐上升,接菌16 d时达到高峰;随接菌浓度的提高,MDA含量、POD和PPO活性均有所增加,尤以接菌浓度为108cfu.mL 1时3种指标显著高于其他处理,分别是未接菌植株的13.1倍、12.9倍和1.9倍;而培养时间对番茄叶片中过氧化氢酶(CAT)活性的影响没有明显规律,对照菌株CAT活性显著高于各接菌处理,说明CAT活性对番茄枯萎病病原菌没有响应。本研究结果表明,结合番茄茎的维管束褐变现象,认为番茄叶片中MDA含量、POD和PPO活性可作为早期判断番茄是否感染枯萎病的重要指标。

夜间低温对番茄幼苗光合作用的影响

以15℃夜温为对照,研究了12℃、9℃、6℃夜间低温对番茄(LycopersiconesculentumMill.)光合作用和叶绿素荧光参数的影响。结果表明:夜间低温抑制了植株总干物质的积累;总叶绿素含量、净光合速率下降;光合作用相关因素中气孔导度(Gs)、胞间CO2浓度(Ci)、蒸腾速率(Tr)下降,气孔限制值(Ls)增大。12℃、9℃夜低温处理10d净光合速率及相关因素可恢复到正常水平;6℃低温处理10d对番茄净光合速率的影响则不可恢复,而对光合作用相关因素的影响是可恢复的,说明在恢复期间6℃夜低温处理净光合速率的降低与Gs、Ci、Tr、Ls无关。所有夜间低温处理对Fv/Fm、ΦPSⅡ、ETR影响较小,低温胁迫解除后很快得到恢复,说明试验所设定的夜间低温及其处理时间未对PSⅡ系统造成伤害。

亏缺灌溉对番茄蔗糖代谢和干物质分配及果实品质的影响

在设施内设置4个灌水处理,分别间隔2(CK)、4(处理1)、6(处理2)和8d(处理3)浇1次水,均以浇水后土壤水分张力计回零为准。结果表明,番茄果实中葡萄糖和果糖的含量随生长发育的进行而逐渐提高,蔗糖含量下降;各时期处理3番茄果肉中糖分含量最高,其次为处理2,其余2处理果实糖分含量最低。蔗糖合成酶活性呈下降趋势,蔗糖磷酸合成酶活性逐渐升高,水分亏缺提高了这2种酶的活性,但降低了成熟期酸性转化酶和中性转化酶活性。亏缺灌溉提高了番茄叶片中葡萄糖和果糖含量,同时提高了果实中的可溶性糖、有机酸的含量及糖酸比,增加了植株的干物质积累,但严重亏缺灌溉可明显影响植株上部果实的生长和干物质积累。

番茄不同部位中糖含量和相关酶活性的研究

试验将番茄光合产物运转途径上叶片(源)、运输系统以及果实(库)区分开,分别测定其糖的组成和含量以及糖代谢相关酶的活性。结果表明:番茄光合产物运转途径上从“源”到“库”各部位糖的组成和含量不同。叶肉中果糖的含量最高,蔗糖的含量最低;中筋中以果糖和葡萄糖为主;叶柄维管束中葡萄糖含量最高,蔗糖含量次之,果糖含量最低。节间和果柄维管束中主要含有蔗糖。果实维管束以及果实内各部位中则主要含有葡萄糖和果糖,且两者含量无显著差异,蔗糖含量很低。萼片中葡萄糖含量最高,蔗糖含量最低;果蒂中3种糖含量均较高且无显著差异。番茄叶肉及光合产物运转组织中转化酶活性很低,而在库器官的非维管组织中转化酶活性较高。果蒂中的蔗糖合成酶(SS)活性最高,其次是叶肉和运转组织,果实内各部位中SS活性较低。在合成蔗糖的器官—叶肉中,有较高的蔗糖磷酸合成酶(SPS)活性,运转组织中的SPS活性较叶肉中降低,但果柄维管束和果实维管束中则表现出较高SPS活性,果肉、果胶质胎座及心室隔壁中的SPS活性最低。

外源ABA、BR和ETH对番茄果实番茄红素含量的影响

为探索外源激素对番茄果实中番茄红素含量的影响,改进从番茄果实中正己烷、乙醇以及丁烯羟基甲苯BHT的丙酮混合试剂提取番茄红素的方法,确定了番茄红素最佳提取条件,并利用该条件检测分析了外源ABA(脱落酸)、BR(油菜素内酯)和ETH(乙烯)处理番茄果实后番茄红素的含量。结果表明:200mg·L-1的外源ABA、0.001mg·L-1的外源BR和3000mg·L-1的外源ETH对促进番茄果实中番茄红素含量增加的效果较好,番茄红素含量分别达到115.11μg·g-1FW,106.16μg·g-1FW和125.21μg.g-1FW。外源ABA、BR和ETH均能在不同程度上促进番茄果实中番茄红素含量增加。

低温胁迫下不同耐冷性番茄品种幼叶细胞Ca^(2+)分布变化的差异

采用焦锑酸钙沉淀的电镜细胞化学方法 ,研究了低温胁迫与冷锻炼下不同耐冷性番茄品种幼叶细胞Ca2 + 定位分布的变化。结果表明 :正常生长条件下 ,番茄幼叶细胞Ca2 +主要存在于液泡和细胞间隙内 ,细胞质中含量很低 ,且耐冷性不同品种之间无明显差异。经5℃低温处理 2 4h后 ,耐冷品种细胞内Ca2 + 分布变化明显 ,胞内钙库 (即液泡 )释放Ca2 + 进入细胞基质 ,细胞间隙中仍有大量Ca2 + 存在 ;而冷敏感品种无明显变化。当处理 4 8h后 ,耐冷品种细胞Ca2 + 分布趋向于恢复到处理前的状态 ,而冷敏感品种则在细胞内形成较大的钙沉淀颗粒 ,多分布于叶绿体被膜与质膜内侧 ,细胞间隙内Ca2 + 颗粒也集中聚集成团。昼 15℃ /夜 8℃条件下的冷锻炼对不同耐冷性番茄幼叶细胞内Ca2 +

现代化温室番茄植株各器官鲜物质和干物质分配规律的研究

试验结果表明 :在本试验条件下 ,番茄植株鲜物质分配到根、茎、叶片和果实中的比例分别约为 1 %、2 0 %、5 0 %和 3 0 % ,干物质分配到根、茎、叶片和果实中的比例分别约为 2 %、2 5 %、47%和 2 6%。果实干重占植株总干重的比例为 2 6% ,果实干重与营养器官干重的比率为 3 4%。植株的平均干物质含量为 1 0 .2 % ,其中果实的干物质含量为 5 .0 % ,叶片、茎和根的干物质含量分别为 1 1 .6%、1 1 .3 %和 1 4.9%。

温室番茄长季节栽培生长发育特性的研究

为研究在我国温室条件下番茄的生长发育规律 ,建立适应我国气候条件下的番茄生长模型 ,在山西太谷 (北纬 37°2 5″ ,东经 112°2 5″)山西农业大学设施农业工程研究所的温室内进行了番茄长季节栽培试验 (土壤栽培 ) ,所用品种为从荷兰引进的温室番茄专用品种Counter。结果表明在我国华北地区温室番茄长季节栽培能够成功。在试验条件下 ,番茄生育周期 2 5 2d时 ,茎长达 5 0 8cm ,叶数为 79.9片 ,花穗数是 2 2 .7。第一花穗以上的叶花比是 3.2。节间长 5～ 6cm。观察到的叶片出现率和花穗出现率相吻合 ,在春夏季分别是 0 .3971叶 /d和 0 .12 6 7花穗 /d ,即每 2 .5d长 1片叶 ,平均每 8d出现 1穗花。而在冬季 (11、12月 )是 0 .1138叶 /d和 0 .0 2 77花穗 /d ,即每 8.8d长 1片叶 ,平均每 36d出现 1穗花。

微生物肥与化肥配施对基质栽培番茄产量、品质、光合特性及基质微生物的影响

【目的】研究不同化肥施用水平配施微生物肥对番茄产量、品质、光合特性及基质微生物数量的影响.【方法】采用大田试验,设8个处理,即不施肥(CK),100%常规施肥(100HF),80%常规施肥(80HF),70%常规施肥(70HF),100%常规施肥+微生物(100HFW),80%常规施肥+微生物肥(80HFW),70%常规施肥+微生物肥(70HFW),单施微生物肥(W).【结果】与100HF处理相比,100HFW处理和80HFW处理分别提高产量11.00%和9.07%.微生物肥的施入能提高VC和可溶性糖含量,降低有机酸和硝酸盐含量;与100HF处理相比,微生物肥与化肥配施能提高净光合速率(Pn)、气孔导度(Gs)和蒸腾速率(Tr),降低了胞间CO2浓度(Ci);微生物肥的施入能有效提高栽培基质中真菌、细菌和放线菌数量,其中80HFW与100HF相比,真菌、细菌和放线菌数量分别提高了75.89%、89.87%和21.27%.【结论】在不影响番茄产量的前提下,考虑经济因素,80HFW处理可以作为非耕地日光番茄基质栽培较为适宜的配施处理.

番茄种子吸湿—回干处理对盐胁迫伤害的缓解效应

在NaCl胁迫下 ,番茄种子萌发过程中超氧物歧化酶 (SOD)和过氧化氢酶(CAT)活性明显降低 ,丙二醛 (MDA)含量和电解质渗漏显著增加 ,种子内Na+ 含量大幅度上升而K+ 大量外渗 ,从而显著抑制种子萌发。将种子进行吸湿—回干处理后再置于NaCl胁迫下 ,NaCl的上述伤害得到显著缓解。吸湿—回干处理有可能通过提高细胞膜保护酶活性 ,抑制膜脂过氧化来维持细胞膜结构的完整性 ,因而减少Na+ 的大量吸收及K+ 的外渗 ,最终提高了盐胁迫下种子的萌发能力。