Saline-Alkali Tolerance in Rice: Physiological Response, Molecular Mechanism, and QTL Identification and Application to Breeding

Salinity-alkalinity is incipient abiotic stress that impairs plant growth and development.Rice(Oryza sativa)is a major food crop greatly affected by soil salinity and alkalinity,requiring tolerant varieties in the saline-alkali prone areas.Understanding the molecular and physiological mechanisms of saline-alkali tolerance paves the base for improving saline-alkali tolerance in rice and leads to progress in breeding.This review illustrated the physiological consequences,and molecular mechanisms especially signaling and function of regulating genes for saline-alkali tolerance in rice plants.We also discussed QTLs regarding saline-alkali tolerance accordingly and ways of deployment for improvement.More efforts are needed to identify and utilize the identified QTLs for saline-alkali tolerance in rice.

Overexpression of vacuolar proton pump ATPase(V-H^+-ATPase) subunits B, C and H confers tolerance to salt and saline-alkali stresses in transgenic alfalfa(Medicago sativa L.)

The vacuolar proton pump ATPase（V-H^＋-ATPase）, which is a multi-subunit membrane protein complex, plays a major role in the activation of ion and nutrient transport and has been suggested to be involved in several physiological processes, such as cell expansion and salt tolerance. In this study, three genes encoding V-H^＋-ATPase subunits B（Sc VHA-B, Gen Bank： JF826506）, C（Sc VHA-C, Gen Bank： JF826507） and H（Sc VHA-H, Gen Bank： JF826508） were isolated from the halophyte Suaeda corniculata. The transcript levels of Sc VHA-B, Sc VHA-C and Sc VHA-H were increased by salt, drought and saline-alkali treatments. V-H^＋-ATPase activity was also examined under salt, drought and saline-alkali stresses. The results showed that V-H^＋-ATPase activity was correlated with salt, drought and saline-alkali stress. Furthermore, V-H^＋-ATPase subunits B, C and H（Sc VHA-B, Sc VHA-C and Sc VHA-H） from S. corniculata were introduced separately into the alfalfa genome. The transgenic alfalfa was verified by Southern and Northern blot analysis. During salt and saline-alkali stresses, transgenic lines carrying the B, C and H subunits had higher germination rates than the wild type（WT）. More free proline, higher superoxide dismutase（SOD） activity and lower malondialdehyde（MDA） levels were detected in the transgenic plants under salt and saline-alkali treatments. Moreover, the Sc VHA-B transgenic lines showed greater tolerance to salt and saline-alkali stresses than the WT. These results suggest that overexpression of Sc VHA-B, Sc VHA-C and Sc VHA-H improves tolerance to salt and saline-alkali stresses in transgenic alfalfa.

Improved PBFT protocol based on phase voting and threshold signature

The communication complexity of the practical byzantine fault tolerance(PBFT)protocol is reduced with the threshold signature technique applied to the consensus process by phase voting PBFT(PV-PBFT).As most communication occurs between the primary node and replica nodes in PV-PVFT,consistency verification is accomplished through threshold signatures,multi-PV,and multiple consensus.The view replacement protocol introduces node weights to influence the election of a primary node,reducing the probability of the same node being elected primary multiple times.The experimental results of consensus algorithms show that compared to PBFT,the communication overhead of PV-PBFT decreases by approximately 90% with nearly one-time improvement in the throughput relative and approximately 2/3 consensus latency,lower than that of the scalable hierarchical byzantine fault tolerance.The communication complexity of the PBFT is O(N^(2)),whereas that of PV-PBFT is only O(N),which implies the significant improvement of the operational efficiency of the blockchain system.

ECC Based Threshold Decryption Scheme and Its Application in Web Security

The threshold cryptography provides a new approach to building intrusion tolerance applications. In this paper, a threshold decryption scheme based elliptic curve cryptography is presented. A zero-knowledge test approach based on elliptic curve cryptography is designed. The application of these techniques in Web security is studied. Performance analysis shows that our scheme is characterized by excellent security as well as high efficiency.

A Novel Fuzzy Membership Partitioning for Improved Voting in Fault Tolerant System

This paper presents a novel technique for improved voting by adaptively varying the membership boundaries of a fuzzy voter to achieve realistic consensus among inputs of redundant modules of a fault tolerant system. We demonstrate that suggested dynamic membership partitioning minimizes the number of occurrences of incorrect outputs of a voter as compared to the fixed membership partitioning voter implementations. Simulation results for the proposed voter for Triple Modular Redundancy (TMR) fault tolerant system indicate that our algorithm shows better safety and availability performance as compared to the existing one. However, our voter design is general and thus it can be potentially useful for improving safety and availability of critical fault tolerant systems.

不同浓度微咸水灌溉对土壤水盐分布及冬小麦生长的影响

[目的]微咸水灌溉是缓解农业用水紧张、保障粮食生产的重要途径之一,但灌溉水中的可溶性盐会导致土壤盐分累积,进而影响作物生长,寻求适宜的灌溉水盐分浓度是咸水、微咸水资源得到安全利用的有利保障。[方法]研究采用遮雨盆栽试验种植冬小麦,以去离子水为对照(CK),添加氯化盐形成不同浓度的微咸水处理,灌溉水电导率(EC w)分别为:0.26(CK),3.00(S1),5.26(S2),7.07(S3),9.24(S4)dS/m,研究土壤水盐分布和冬小麦生长、光合生理及产量形成的响应。[结果]不同浓度微咸水灌溉下土壤含水率、土壤含盐量随盐分浓度的增加而增大。当灌溉水电导率为9.24 dS/m时,土壤含水率分别比CK高5.43%(0—10 cm),4.21%(10—20 cm),4.98%(20—40 cm);冬小麦收获后CK及S1-S4处理下0—40 cm土层土壤饱和浸提液电导率(ECe)分别为0.66,4.89,7.88,9.34,10.16 dS/m;与CK相比,灌溉水电导率为3.00,5.26 dS/m时,冬小麦生长、光合生理指标、产量无显著差异,而为7.07,9.24 dS/m时显著降低,当灌溉水电导率为9.24 dS/m时,冬小麦净光合速率、最大株高、最大叶面积、成熟期地上部干物质量、根系干物质量及产量相比CK分别降低71.00%,2.81%,15.33%,15.55%,47.25%,27.53%。利用FAO分段函数拟合计算得冬小麦灌溉微咸水电导率阈值为5.82 dS/m,超过该值,每增加1 dS/m,冬小麦相对产量下降8.80%。[结论]综上所述,灌溉水盐分浓度越高,对土壤水盐分布及冬小麦生长的影响越大,5.82 dS/m为冬小麦的灌溉微咸水电导率阈值。综合考虑冬小麦生长、光合生理指标及土壤理化性质,建议使用微咸水灌溉冬小麦时,EC w不宜超过5.82 dS/m。该研究结果可为微咸水安全利用提供理论支撑。

Resilience4j的熔断策略研究

该文研究了新一代轻量级的容错框架Resilience4j结构功能,结合熔断器工作方式与熔断参数,针对服务的熔断阈值配置问题,提出了一个Resilience4j在微服务平台上的配置方案。根据不同服务的紧迫性,实行不同的配置策略,提升服务性能,有效保护微服务系统。

微生物改良剂动态施用对盐碱地春玉米生长及产量的影响

【目的】利用微生物改良盐碱地具有绿色高效的特点,是实现盐碱地综合改造利用和耕地质量提升的重要措施之一,本文旨在研究盐碱地综合治理时微生物改良剂的合理施用方法。【方法】于2022年研究获得了未进行盐碱地改良时影响春玉米生长的耐盐阈值,2023年在修建排水沟、施用有机肥和采用滴灌进行盐碱地综合改良的基础上,以不施用微生物改良剂的处理为对照,研究了中度盐碱地基施600 kg/hm^(2)固态微生物改良剂、基施300 kg/hm^(2)固态微生物改良剂和在拔节期与抽穗期各追施75 L/hm^(2)液态微生物改良剂、基施300 kg/hm^(2)固态微生物改良剂和根据耐盐阈值进行每次75 L/hm^(2)液态微生物改良剂动态追施的微生物改良剂施用方法对玉米生长和产量的影响。【结果】在苗期、拔节期、抽穗期和灌浆期影响春玉米生长的耐盐阈值分别为1.77、2.28、5.07、5.27 g/kg。与未进行盐碱地改良的2022年玉米相比,进行改良后的各处理玉米出苗率和产量均显著提高,出苗率由34.4%最大提高到70.1%,产量由4.20 t/hm^(2)最大提高到8.62 t/hm^(2),平均增产88.0%。在不同微生物改良剂施用方法的处理下,各处理的株高、叶面积指数、地上部分干物质量和叶片相对叶绿素量在峰值时期分别较对照处理提高了9.9%~17.1%、38.4%~56.1%、26.7%~32.0%和9.2%~11.2%,产量较对照处理提高了30.6%~36.0%,其中基施固态微生物改良剂和根据耐盐阈值进行液态微生物改良剂动态追施的处理对春玉米出苗率、生长指标和产量的提高幅度最大。【结论】在采用排水沟+有机肥+微生物改良剂进行春玉米盐碱地综合治理时,建议微生物改良剂的施用方法宜采用固态基施(300 kg/hm^(2))和液态追施(150 L/hm^(2))相结合,且追施时间宜根据耐盐阈值进行动态调整。

盐碱胁迫下燕麦幼苗生长生理差异及耐盐碱阈值

为研究混合盐碱胁迫对燕麦幼苗生长、生理的影响,计算耐盐碱阈值,选用相对盐碱敏感品种‘白燕5号’和相对耐盐碱品种‘坝莜18号’为试验材料,设置不同浓度的盐碱胁迫处理,分析燕麦生长、生理指标的变化。结果表明:(1)不同浓度盐碱胁迫对‘白燕5号’和‘坝莜18号’幼苗的株高、根长和生物量有不同程度的抑制作用,分别在150 mmol/L和200 mmol/L胁迫时差异显著。(2)随着胁迫浓度的升高,‘白燕5号’SPAD值、P_(n)、G_(s)及T_(r)均呈下降趋势,在100 mmol/L胁迫时差异显著;‘坝莜18号’SPAD值、P_(n)、G_(s)、T_(r)则表现出先升后降的趋势,C_(i)呈先降后升的趋势,胁迫达到200 mmol/L时差异显著。(3)‘白燕5号’和‘坝莜18号’脯氨酸(Pro)和丙二醛(MDA)含量随着胁迫浓度的增加均呈上升趋势,过氧化氢酶(CAT)活性则呈相反趋势,超氧化物歧化酶(SOD)、过氧化物酶(POD)活性呈先升后降的趋势,‘白燕5号’和‘坝莜18号’SOD活性分别在150 mmol/L和200 mmol/L胁迫时达到峰值且差异显著。(4)以株高较对照降低50%为标准,得‘白燕5号’和‘坝莜18号’幼苗对盐碱胁迫的耐受阈值分别为163.4 mmol/L和200.0 mmol/L。综上所述,燕麦幼苗混合盐碱耐受阈值的确定,可为盐碱地燕麦栽培与推广应用提供理论依据。

双维度视阈下家庭收入期望差距对消费的影响

消费是保持经济持续稳定增长最主要的需求来源,深入挖掘消费潜能、充分发挥消费对经济增长的驱动作用对经济复苏和持续发展至关重要。文章基于前景理论,采用中国家庭金融调查数据,从历史和社会双维度视阈探讨了家庭收入期望差距对消费行为的影响及作用机理。家庭收入期望差距对消费有显著影响,但具有不对称性,总体而言,收入期望顺差对消费的影响落差较大。家庭收入社会期望顺差显著促进消费,落差显著抑制消费;家庭收入历史期望顺差和落差均显著促进消费。收入社会期望顺差比历史期望顺差对当期消费促进作用更强,长期则反之。分析表明,收入期望顺差通过提升家庭风险容忍度进而促进消费,而在收入社会期望处于落差状态下家庭风险容忍度不易改变。研究为解释家庭消费行为和制定刺激消费需求相关政策提供了新的观点和实证依据。

基于联盟链微电网交易的PBFT共识算法改进

针对联盟链微电网电力交易场景的高吞吐量、高数据安全性及数据透明性的需求,提出一种在贡献值模型下的基于可验证随机函数(Verifiable Random Function,VRF)与基于BLS(Boneh-Lynn-Shacham Threshold Signatures,BLS)门限签名的改进实用拜占庭容错共识算法(Contribution Value Model,Verifiable Random Function and Boneh-Lynn-Shacham Threshold Signatures Practical ByzantineFault Tolerance,CVB-PBFT)。CVB-PBFT算法通过贡献值模型筛选高贡献节点参与共识,采用VRF和安全随机函数选举不可预测的主节点,结合节点轮换和检测机制以及BLS签名优化通信流程,显著提高算法的性能和安全性。经实验证明,该算法能够有效防御恶意攻击,降低通信开销,并提升共识效率,满足微电网电力交易对时效性和安全性的要求。

The Effect of Internal Heat Acupuncture on the Tolerance Time of Plantar Hot Plate and Pain Threshold of Gastrocnemius Muscle in Rats with Chronic Myofascial Pain Syndrome

Objective:To investigate the effect of internal heat acupuncture on the tolerance time of plantar hot plate and the pain threshold of gastrocnemius in rats with chronic myofascial pain syndrome(MPS).Methods:A total of 80 adult Wistar rats were randomly selected to establish chronic MPS rat models,and randomly divided into four groups:control group,acupuncture group,internal heat acupuncture group A,and internal heat acupuncture group B,with 20 rats in each group.The rats in the control group were not given any treatment,and the rats in the acupuncture group were only given acupuncture treatment.The rats in group A were treated with internal heat acupuncture(needle heating up to 42℃),and the rats in group B were treated with internal heat acupuncture(needle heating up to 44℃).The tolerance time of plantar hot plate,the pain threshold of gastrocnemius muscle and the level of tumor necrosis factor-α(TNF-α)were observed and compared before modeling,1 d before treatment,and 1,7 and 14 d after treatment.Results:There were significant differences in hot plate tolerance time,time and interaction among the four groups(P<0.05),as well as in gastrocnemius tenderness threshold,time and interaction among the four groups(P<0.05),and there were also significant differences in TNF-αlevel among the three groups(P>0.05).There were significant differences in the number of electric shocks,time and interaction among the four groups(P<0.05).Conclusion:In contrast to conventional acupuncture treatment,internal heat acupuncture demonstrates greater efficacy in extending the tolerance duration of hot plate exposure and enhancing the pain threshold of the gastrocnemius muscle in rats afflicted with myofascial pain syndrome.Additionally,it accelerates the amelioration of inflammatory markers and motor function.However,it is important to note that the therapeutic impact of internal heat acupuncture may be influenced by its temperature,with 44℃being the most effective in this research.

蒲公英苗期盐胁迫反应及耐盐阈值的确定

为筛选耐盐蒲公英品种,采用盆栽试验,分析不同盐分质量分数的滨海原土对蒲公英幼苗的生长发育及体内不同部位Na^+和K^+质量分数及K^+/Na^+的影响,通过相关性分析和回归分析,确定蒲公英幼苗期耐盐鉴定指标和耐盐阈值。结果表明,随着土壤盐分质量分数的增加,幼苗存活率、叶长、叶宽、叶片数、地上和地下干物质质量均有所下降,但较低盐分(0.2%)可促进幼苗生长;地上部Na^+和K^+质量分数及K^+/Na^+均与土壤盐分质量分数相关,而地下部这些指标与土壤盐分质量分数相关性不大;确定了蒲公英苗期耐盐鉴定指标为叶长,耐盐阈值为0.42%。

7050铝合金锻件缺陷容限值试验方法研究

缺陷容限设计方法充分考虑直升机的特点,将损伤容限设计思想巧妙地应用于直升机的设计中,通过缺陷容限值保证关键动部件的服役安全。本文采用疲劳极限反推的方法测试了三种尺寸的缺陷容限门槛值,分别采用有限元法和Y.Murakami公式计算缺陷容限门槛值,结果表明:含有265μm,374μm,480μm缺陷尺寸的三种试件缺陷容限门槛值基本相同;缺陷容限门槛值明显低于长裂纹门槛值,采用长裂纹门槛值作为缺陷容限门槛值会导致偏于危险的结果;有限元法与Y.Murakami公式应力强度因子计算结果非常接近,Y.Murakami公式计算结果略低于有限元法。

林区啮齿动物群落管理中的生态阈值研究

以人工林生态系统中的啮齿动物群落和主要造林树种为研究对象,提出了人工林群落生态阈值概念。采用系统分析法,组建了刺槐、油松、侧柏被害模型和飞播造林 30d种子损失模型,并以国家及地方标准的最大允许损失指标偶联求得林区啮齿动物群落管理中的生态阈值模型。结果表明,群落总密度和地面鼠的单因子群落生态阈值刺槐最大,油松次之,侧柏最小;鼢鼠和田鼠在高允许损失率下为刺槐>油松>侧柏,而在低允许损失率下为油松>侧柏>刺槐;草兔为油松最大,侧柏最小;飞播造林中的单因子群落生态阈值不仅决定于地面鼠的总密度,而且还决定于群落各组分的构成,尤其是松鼠和田鼠的种群密度。秦巴山地和桥山天然次生林区林木被害死亡率预测值小于常规造林的最大允许损失率,其余林区林木被害死亡率的预测值超过了常规造林的最大允许损失率。

蕨类植物的叶绿素、光合参数与耐荫性

为进行耐荫蕨类筛选,通过收集文献数据,选择比叶面积、比叶重、叶绿素含量、最大光合速率、光补偿点和光饱和点6个指标,计算各指标的表型可塑性指数（PPI）和耐荫临界值（STT）.结果表明：蕨类植物的PPI变化范围为0·74~0·96,各指标的STT值分别为叶绿素质量分数1·9 mg·g-1、叶绿素a/b值2·3、比叶重36 g·cm-2、最大光合速率5·5μmol·m-2·s-1、光补偿点24μmol·m-2·s-1、光饱和点460μmol·m-2·s-1.利用STT值可以进行多途径的耐荫蕨类评价和筛选.

混合盐胁迫对江苏省沿海常用绿化树种生长的影响及耐盐性评价

依据江苏滨海盐渍土的离子组成和含量,采用土培法研究了经0.0(CK)、3.0、5.0和8.0 g·kg-1混合盐胁迫处理后江苏沿海常用绿化植物(包括16种乔木和8种灌木)的盐害指数、死亡率、苗高生长量和相对干质量;在此基础上,依据Logistic方程和耐盐阈值(T50)对各种类的耐盐性进行了初步评价。结果表明:随土壤中混合盐质量浓度的提高,各种类的盐害指数和死亡率总体呈逐渐升高的趋势,而苗高生长量和相对干质量总体呈逐渐下降的趋势,但不同种类各指标的变化幅度有明显差异。总体上看,经不同质量浓度混合盐胁迫处理后,乔木树种中‘中山杉406’(Taxodium hybrid‘Zhongshanshan 406’)以及灌木树种中海滨木槿(Hibiscus hamabo Sieb.et Zucc.)、海桐〔Pittosporum tobira(Thunb.)Ait.〕和匍地柏〔Sabina procumbens(Endl.)Iwata et Kusaka〕植株全部存活且盐害指数低,而其他树种的死亡率较高甚至达到100%且盐害指数均较高;乔木树种中银杏(Ginkgo biloba Linn.)和‘中山杉406’以及灌木树种中海滨木槿、匍地柏、黄杨〔Buxus sinica(Rehd.et Wils.)Cheng〕和海桐的相对干质量较高;乔木树种中紫穗槐(Amorpha fruticosa Linn.)、海棠〔Malus spectabilis(Ait.)Borkh.〕和‘中山杉406’以及灌木树种中海桐、匍地柏和海滨木槿的苗高生长量较高。此外,乔木树种中‘中山杉406’、女贞(Ligustrum lucidum Ait.)和海棠以及灌木树种中海滨木槿、海桐、匍地柏、黄杨、日本珊瑚树〔Viburnum odoratissimum var.awabuki(K.Koch)Zabel ex Rumpl.〕和石楠(Photinia serrulata Lindl.)的T50值均较高。综合分析结果显示:刺槐(Robinia pseudoacacia Linn.)、银杏、台湾含笑〔Michelia compressa(Maxim.)Sarg.〕、白蜡树(Fraxinus chinensis Roxb.)、海棠、女贞、‘中山杉406’、石楠和日本珊瑚树可耐受低浓度的混合盐胁迫,黄杨和匍地柏可耐受中浓度的混合盐胁迫,而海滨木槿和海桐可耐受高浓度的混合盐胁迫。

不同小麦品种的耐盐性比较研究

比较了小麦品种德抗961和鲁麦15的耐盐阈值,盐胁迫下的出苗率、出苗时间、光合速率以及干重.结果显示:德抗961的耐盐阈值是鲁麦15的1.5倍,前者是287 mmol/L NaCl,后者为190 mmol/L NaCl;盐胁迫下,与鲁麦15相比德抗961出苗及时,并且整齐,光合速率在较高浓度的盐胁迫下才表现出明显降低,其净生物产量与对照相比的降低率是鲁麦15的1/2.

白颖苔草对不同浓度NaCl胁迫的响应及其耐盐阈值

以白颖苔草(Carex rigescens)为研究材料,采用盆栽试验研究了不同浓度NaCl(0,100,200,300,400,500mmol·L^(-1))处理下白颖苔草地上部生长和生理等指标的变化趋势,分析了不同浓度盐处理对白颖苔草生长的影响,并计算确定了其耐盐性的阈值。结果表明,盐处理对白颖苔草的生长产生了抑制作用。随NaCl处理浓度增加,白颖苔草的株高、叶长和叶宽均呈下降趋势,同时枯叶率显著升高(P<0.05)。白颖苔草叶片相对含水量随NaCl浓度的增加呈下降趋势,而叶片的质膜透性则呈升高趋势。但两指标在低浓度盐(NaCl为100和200mmol·L^(-1))处理下较无胁迫对照无显著差异(P>0.05),当NaCl浓度超过300mmol·L^(-1)时,两指标发生显著变化(P<0.05)。超氧化物歧化酶(SOD)和过氧化物酶(POD)活性随NaCl浓度的增加呈先升高后降低的趋势,在300mmol·L^(-1)处理下均达到最大值,说明在NaCl浓度300mmol·L^(-1)左右可能存在白颖苔草耐盐的临界浓度。不同浓度NaCl处理对白颖苔草叶片叶绿素a,叶绿素b和叶绿素a+b均产生了不同程度的影响。随盐浓度的增加,叶绿素a和叶绿素a+b含量呈先升高后降低趋把势,叶绿素b含量呈降低趋势,而叶绿素a/b值无显著变化(P>0.05)。以白颖苔草生物量下降50%时的盐浓度来评价其耐盐性,建立回归方程确定其耐盐阈值为263mmol·L^(-1)。上述结果表明,白颖苔草对盐胁迫有较高的耐受性,在一定范围的盐胁迫环境中能正常生长,该结果可为后续白颖苔草耐盐机制的研究提供理论依据。

盐碱胁迫对枸杞幼苗生物量积累和光合作用的影响

以内陆高寒区盐碱地重要的经济树种枸杞2年生幼苗为研究对象,采用盆栽控制试验方法,设置50、100、200、300mmol·L^(-1)共4个盐和碱(NaCl和NaHCO3)胁迫浓度,研究盐、碱胁迫对枸杞苗木生长和光合的影响,以明确枸杞幼苗生长的耐盐、碱浓度范围,探讨土壤盐碱含量与土壤水分含量的关系,为不同类型盐碱条件下枸杞的种植和水分管理提供理论依据。结果表明:(1)随着盐碱胁迫浓度的增大,枸杞幼苗根茎叶生物量及叶绿素含量(SPAD)、净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs)和胞间二氧化碳浓度(Ci)等光合作用参数逐渐受到显著抑制,且碱胁迫的抑制作用更强烈;但低浓度(50mmol/L)NaCl胁迫下,枸杞幼苗叶绿素含量和净光合速率并未受到显著影响。(2)在盐碱胁迫条件下,枸杞幼苗的最大净光合速率(Pnmax)、暗呼吸速率(RD)、初始量子效率(AQY)、光饱和点(LSP)均低于对照,而光补偿点(LCP)高于对照,且随着胁迫浓度的增加,碱胁迫处理下的变幅大于盐胁迫。(3)随着胁迫浓度的增大,影响净光合速率的因素由气孔限制转向非气孔限制的临界值,在盐胁迫下的临界浓度约为200mmol/L,在碱胁迫下的临界浓度约为100mmol/L。(4)按照指标值超过对照组50%标准,经回归分析确定,枸杞耐盐和耐碱阈值分别为(246.3±2.1)mmol/L和(126.7±2.7)mmol/L;在此阈值的基础上,得到土壤含水量与土壤含盐量回归曲线方程。研究认为,枸杞幼苗具有一定的耐盐能力,但过高浓度的盐碱胁迫会损坏其光合结构,降低光环境适应能力和光合作用效率,从而影响其正常生长。