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甜瓜雙單倍體組培生根過(guò)程中內(nèi)源激素、多胺及相關(guān)氧化酶活性的變化

2023-10-27 01:31:29趙衛(wèi)星高寧寧康利允程志強(qiáng)梁慎常高正李海倫王慧穎徐小利李曉慧
果樹(shù)學(xué)報(bào) 2023年10期
關(guān)鍵詞:甜瓜

趙衛(wèi)星 高寧寧 康利允 程志強(qiáng) 梁慎 常高正 李海倫 王慧穎 徐小利 李曉慧

DOI:10.13925/j.cnki.gsxb.20230148

摘? ? 要:【目的】探究甜瓜雙單倍體組培苗內(nèi)源激素、多胺類物質(zhì)和關(guān)聯(lián)酶對(duì)不定根誘導(dǎo)分化和伸長(zhǎng)響應(yīng)的生理機(jī)制?!痉椒ā恳晕词芫臃侩x體培養(yǎng)獲得的雙單倍體芽為試材,在生根培養(yǎng)基上誘導(dǎo)培養(yǎng),探討和分析其生根過(guò)程中內(nèi)源激素、多胺類物質(zhì)含量以及相關(guān)酶活性的變化規(guī)律?!窘Y(jié)果】生根誘導(dǎo)過(guò)程中吲哚乙酸(IAA)、脫落酸(ABA)含量呈現(xiàn)“下降-升高”的趨勢(shì),分別在第7天和第14天達(dá)到最低值;赤霉素(GA3)含量先升高后下降,在第7天時(shí)達(dá)到最大值;玉米素核苷(ZR)含量呈現(xiàn)“下降-升高-下降”的趨勢(shì),在第21天達(dá)到最大值;IAA/ABA和過(guò)氧化物酶(POD)活性逐漸升高,IAA/ZR和精胺(Spm)、亞精胺(Spd)、腐胺(Put)含量及吲哚乙酸氧化酶(IAAO)、多酚氧化酶(PPO)活性呈現(xiàn)“升高-下降-升高”的趨勢(shì)。相關(guān)性分析可知,Put與IAA/ABA、Spm以及IAAO與GA3存在極顯著正相關(guān)性(p<0.01),Spm與IAA/ABA、Spd,Put與Spd、POD以及IAAO與PPO呈顯著正相關(guān)性(p<0.05),Spd與ABA含量存在極顯著負(fù)相關(guān)性(p<0.01)?!窘Y(jié)論】一定范圍內(nèi)的IAA、ABA含量、IAA/ABA和IAA/ZR升高及GA3、ZR含量降低有利于不定根誘導(dǎo)分化和生長(zhǎng)發(fā)育,后期組培苗體內(nèi)Spm、Spd、Put含量的升高有利于不定根的形成,IAAO、PPO、POD酶活性變化與不定根的發(fā)生和伸長(zhǎng)也有密切聯(lián)系。

關(guān)鍵詞:甜瓜;雙單倍體芽;組培生根;內(nèi)源激素;多胺;關(guān)聯(lián)酶

中圖分類號(hào):S652 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1009-9980(2023)10-2195-09

Dynamic changes in polyamines, endogenous hormones and oxidase activities during rooting of double haploid muskmelon in vitro plantlets

ZHAO Weixing1, GAO Ningning1, KANG Liyun1, CHENG Zhiqiang2, LIANG Shen1, CHANG Gaozheng1, LI Hailun1, WANG Huiying1, XU Xiaoli1, LI Xiaohui 1*

(1Institute of Horticulture, Henan Academy of Agricultural Sciences, Zhengzhou 450002, Henan, China; 2Kaifeng Agricultural and Forestry Research Institute, Kaifeng 475004, Henan, China)

Abstract: 【Objective】 Muskmelon is one of the most important fruits in the world, which plays an important role in the adjustment of agricultural planting structure in China. But the narrow genetic basis, the lack of excellent germplasm resources, the long cycle and low efficiency of traditional breeding technology lead to the slow renewal of excellent varieties, which restricts the sustainable development of muskmelon industry. As a breeding method that can quickly and effectively obtain homozygous germplasm, the double monomer culture technology has become a research hotspot for muskmelon breeding workers at home and abroad. Rooting induction culture is an important part of the double haploid tissue culture system, which is directly related to the survival rate and seedling quality of tissue culture plantlets. There are many internal and external factors affecting the rooting process, including endogenous hormones, polyamines, related oxidases and exogenous substances such as ethylene and salicylic acid. The study aimed at investigating the changes of endogenous hormones, polyamine contents and related oxidase activities in the rooting culture process of melon double haploid shoots, in order to clarify the physiological mechanism of the response to adventitious root induction, differentiation and elongation, and to provide reference for regulating the rapid rooting of melon double haploid tissue culture plantlets. 【Methods】The unfertilized ovary of thick-skinned muskmelon hybrids Jinxiucuiyu was cultured on MS+0.03 mg·L-1 TDZ+0.2 mg·L-1 KT+0.01 mg·L-1 IAA+15% coconut juice medium to obtain haploid buds, and then doubled with 700 mg·L-1 colchicines, after identification by flow cytometry, the double haploid buds with the same growth were selected and transfered onto MS+0.1 mg·L-1 IAA+30 g·L-1 sucrose+6 g·L-1 agar medium (pH=5.86) for rooting culture, all of were incubated at (25±2) ℃, under a 16 h light/8 h dark cycle and 3000-4000 lx light intensity, the contents of endogenous hormones, polyamines and related oxidase activities in the basal stems were measured by liquid chromatography and catechol, colorimetry method at 0, 7, 14, 21 28 d respectively. 【Results】 During the course of rooting induction, the contents of indoleacetic acid (IAA) and abscisic acid (ABA) decreased firstly and then increased. The content of gibberellin (GA3) rose in the first seven days and decreased between the 7th day and the 28th day. The variation in zeatin nucleoside (ZR) content followed a pattern of “decrease-increase-decrease”. The content of IAA/ABA and peroxidase (POD) activities increased gradually. The IAA/ZR ratio and spermine (Spm), spermidine (Spd), putrescine(Put) contents and indoleacetic acid oxidase (IAAO), polyphenol oxidase(PPO) activities showed a trend of “increase-decrease-increase”, the three polyamines reached the first peak on the 14th day and reached the maximum on the 28th day, the ratio of IAA/ZR reached the first peak on the 14th day and reached the maximum on the 28th day, the activities of IAAO and PPO increased rapidly from 0 to 7 days, reaching the maximum on the 7th and 14th days respectively, and the change range of them was relatively small from 7 to 28 days, and IAA content decreased rapidly from 0 to 7 d, decreased slowly in 7-14 d, increased slowly in 14-21 d, increased rapidly in 21-28 d, ABA content decreased rapidly in 0-14 d, increased slowly in 14-28 d. The correlation analysis showed that there were significant positive correlations between Put and IAA/ABA value, Spm, and between GA3 contents and IAAO activity (p<0.01), and significant positive correlations between Spm content and IAA/ABA value, Spd, and between Put and Spd contents, POD activities, and between IAAO and PPO activities (p<0.05), and significant negative correlation between Spd and ABA contents (p<0.01). It was proved that IAA/ABA ratio and Put content would play an important role in promoting the differentiation and growth of adventitious roots of muskmelon double haploid tissue culture plantlets. 【Conclusion】 The increase of IAA, ABA contents, IAA/ABA and IAA/ZR values and the decrease of GA3 and ZR contents in a certain range were conducive to adventitious root induction, differentiation and growth, the increase of Spm, Spd Put contents in late tissue culture plantlets was conducive to the formation of adventitious roots. In addition, the changes of IAAO, PPO, POD enzyme activities were closely related to the occurrence and elongation of adventitious roots.

Key words: Muskmelon; Double haploid; Tissue culture; Endogenous hormone; Polyamine; Associated enzyme

甜瓜(Cucumis melo L.)是全世界普遍栽培的一種葫蘆科作物,具有較高的商品價(jià)值和經(jīng)濟(jì)價(jià)值[1]。甜瓜遺傳基礎(chǔ)狹窄,優(yōu)異種質(zhì)資源缺乏,傳統(tǒng)育種技術(shù)周期長(zhǎng)、效率低,導(dǎo)致優(yōu)良品種更新慢,制約了我國(guó)甜瓜產(chǎn)業(yè)的可持續(xù)發(fā)展。雙單倍體培養(yǎng)技術(shù)作為可以快速有效獲取純合種質(zhì)的一種育種手段,已成為國(guó)內(nèi)外甜瓜育種工作者研究的熱點(diǎn)[2-4]。植物不定根的發(fā)生受多種內(nèi)外因素的影響,內(nèi)源植物激素是誘導(dǎo)不定根發(fā)生的主導(dǎo)因子[5-6]。王雪姣[7]的研究發(fā)現(xiàn),吲哚乙酸(IAA)、赤霉素(GA3)、細(xì)胞分裂素(ZR)對(duì)不定根的形成有促進(jìn)作用,脫落酸(ABA)則對(duì)不定根的形成有抑制作用,IAA/ABA比值的提高,有利于不定根的形成。多胺作為一類生長(zhǎng)調(diào)控物質(zhì),可通過(guò)影響激素的代謝或信號(hào)傳導(dǎo)調(diào)控不定根的發(fā)生與伸長(zhǎng)[8-9]。Faivre-Rampant等[10]對(duì)煙草的研究發(fā)現(xiàn)培養(yǎng)基中添加精胺(Spm)、亞精胺(Spd)、腐胺(Put)等多胺類物質(zhì)對(duì)幼苗不定根形成有明顯促進(jìn)作用;相關(guān)氧化酶活性與植物不定根的發(fā)生和發(fā)展也有著密切的關(guān)系[11]。徐盼盼[12]對(duì)牡丹外植體組織培養(yǎng)研究,認(rèn)為吲哚乙酸氧化酶(IAAO)能夠氧化植物體內(nèi)的IAA,從而影響不定根的形成,多酚氧化酶(PPO)、過(guò)氧化物酶(POD)可以催化酚類物質(zhì)與IAA結(jié)合成一種“IAA-酚酸復(fù)合物”,加速不定根的產(chǎn)生。目前,國(guó)內(nèi)外大多數(shù)學(xué)者對(duì)甜瓜雙單倍體的研究多集中在培養(yǎng)體系建立方面,并取得了一定的研究進(jìn)展[13-16],但有關(guān)誘導(dǎo)組培生根過(guò)程中內(nèi)源激素、多胺類物質(zhì)及相關(guān)氧化酶活性的變化未見(jiàn)報(bào)道。為此,筆者在本研究中主要通過(guò)探究甜瓜雙單倍體芽生根培養(yǎng)過(guò)程內(nèi)源激素、多胺類物質(zhì)含量以及相關(guān)氧化酶活性的變化規(guī)律,以期闡明其對(duì)不定根誘導(dǎo)分化和伸長(zhǎng)響應(yīng)的生理機(jī)制,為調(diào)控甜瓜雙單倍體組培苗快速生根提供參考。

1 材料和方法

1.1 材料

供試品種為錦繡脆玉,由河南省農(nóng)業(yè)科學(xué)院園藝研究所選育的厚皮甜瓜雜交種;將其未受精子房離體培養(yǎng)獲得的芽,經(jīng)流式細(xì)胞儀鑒定為單倍體,利用秋水仙素進(jìn)行加倍,再經(jīng)流式細(xì)胞儀鑒定確認(rèn)為雙單倍體芽[17]。

1.2 試驗(yàn)設(shè)計(jì)

選取長(zhǎng)勢(shì)一致的雙單倍體芽接入培養(yǎng)基(MS+IAA 0.1 mg·L-1+30 g·L-1蔗糖+6 g·L-1瓊脂,pH=5.86)中,在溫度(25±2) ℃、光照度3 000~4 000 lx、光照時(shí)間16 h·d-1的條件下進(jìn)行生根培養(yǎng)。每瓶接種8株,共接入120瓶。分別生長(zhǎng)至0、7、14、21、28 d,取基部莖段(長(zhǎng)度約0.5 cm)進(jìn)行內(nèi)源激素、多胺及相關(guān)酶活性的測(cè)定。試驗(yàn)采用隨機(jī)區(qū)組設(shè)計(jì),每個(gè)測(cè)定時(shí)段隨機(jī)選6瓶,3次重復(fù)。

1.3 測(cè)定項(xiàng)目與方法

內(nèi)源激素:吲哚乙酸、玉米素核苷(ZR)、赤霉素、脫落酸含量測(cè)定采用液相色譜法[18]。液相色譜條件:島津LC-20AT,紫外檢測(cè)器SPD-20A,柱溫箱CTO-20AC,C18反相色譜柱(150 mm×4.6 mm,5 μm);流動(dòng)相A:100%甲醇;B:0.1%乙酸水溶液;A∶B=55∶45;進(jìn)樣量20 μL,流速0.8 mL·min-1,柱溫30 ℃,紫外波長(zhǎng)254 nm。

多胺類物質(zhì):精胺、亞精胺、腐胺含量測(cè)定采用液相色譜法[19]。液相色譜條件:伍豐LC-100,C18反相色譜柱(150 mm×4.6 mm,5 μm);流動(dòng)相A:90%乙腈/10%(含0.1%乙酸的0.1 mol·L-1乙酸胺);B:10%乙腈/90%(含0.1%乙酸的0.1 mol·L-1乙酸胺);A∶B=60∶40;進(jìn)樣量20 μL,流速0.8 mL·min-1,柱溫35 ℃,紫外波長(zhǎng)254 nm。

相關(guān)酶活性:多酚氧化酶活性測(cè)定采用鄰苯二酚法,吲哚乙酸氧化酶和過(guò)氧化物酶活性測(cè)定采用比色法,均參照李合生[20]的方法略有改動(dòng)。

1.4 數(shù)據(jù)處理

試驗(yàn)數(shù)據(jù)用Microsoft Excel 2013和SPSS 20.0軟件進(jìn)行處理分析,差異性比較采用Duncans新復(fù)極差法。

2 結(jié)果與分析

2.1 甜瓜雙單倍體生根過(guò)程中不同時(shí)期的變化

從圖1可以看出,接種后7 d時(shí)莖段基部細(xì)胞開(kāi)始啟動(dòng)分化,愈傷組織開(kāi)始出現(xiàn),以后進(jìn)入細(xì)胞分裂旺盛期,14 d時(shí)不定根根原基逐漸開(kāi)始形成,21 d時(shí)外植體上形成肉眼可見(jiàn)的不定根,之后不定根數(shù)量和長(zhǎng)度逐漸增加和伸長(zhǎng),28 d以后須根數(shù)量和伸長(zhǎng)量明顯增加。

2.2 甜瓜雙單倍體生根過(guò)程中內(nèi)源激素含量及比值的變化

甜瓜雙單倍體生根過(guò)程中內(nèi)源激素IAA、ABA含量(w,后同)均呈現(xiàn)下降-升高的趨勢(shì),GA3含量呈現(xiàn)升高-下降的趨勢(shì),ZR含量則呈現(xiàn)下降-升高-下降的趨勢(shì)(圖2)。其中,IAA含量在第7天時(shí)最低,0~7 d下降迅速,7~21 d上升緩慢,21~28 d上升迅速,在28 d達(dá)到最高值,為0.33 μg·g-1;ABA含量在0 d時(shí)最高,為0.35 μg·g-1,在第14天達(dá)到最低,0~14 d迅速下降,14~28 d緩慢上升;GA3含量在第7天達(dá)到最高值,為4.41 μg·g-1,0~7 d上升迅速,7~21 d下降速度較快,21~28 d下降平緩;ZR含量在0~7 d緩慢下降,7~21 d迅速上升,21~28 d又迅速下降,在21 d時(shí)最高為3.11 μg·g-1。上述結(jié)果表明,甜瓜雙單倍體組培苗生根與IAA、ABA、ZR、GA3 4種內(nèi)源激素密切相關(guān),在幼苗發(fā)育后期,一定范圍內(nèi)的IAA、ABA含量升高及GA3、ZR含量降低有利于不定根誘導(dǎo)分化和生長(zhǎng)發(fā)育。

IAA/ABA值呈現(xiàn)逐漸增長(zhǎng)趨勢(shì),其中0~7 d增長(zhǎng)緩慢,7~28 d增長(zhǎng)迅速;IAA/ZR值呈現(xiàn)升高-下降-升高的變化趨勢(shì),0~21 d變化較為平緩,21~28 d升高迅速(圖3)。表明IAA/ABA、IAA/ZR的值與甜瓜雙單倍體生根有緊密關(guān)系,后期IAA/ABA和IAA/ZR值的升高有利于不定根的發(fā)生。

2.3 甜瓜雙單倍體在生根過(guò)程中多胺類物質(zhì)含量的變化

腐胺、精胺和亞精胺含量在誘導(dǎo)生根過(guò)程中均呈現(xiàn)升高-下降-升高的變化趨勢(shì)(圖4),0~14 d和21~28 d逐漸上升,14~21 d逐漸下降,在14 d時(shí)達(dá)到第一個(gè)峰值,分別為14.65 μg·g-1、4.90 μg·g-1、12.57 μg·g-1,且14~28 d均顯著高于第0天,第28天分別比第0天提高387.08%、796.55%、327.16%。Put和Spm含量0~7 d變化較為平緩,7~28 d變化幅度較大,Spd含量則在0~7 d變化幅度較大,7~28 d變化較為平緩。表明甜瓜雙單倍體生根過(guò)程與多胺類物質(zhì)Put、Spm和Spd含量有關(guān),后期其含量的升高有利于不定根的形成。

2.4 甜瓜雙單倍體在生根過(guò)程中相關(guān)酶活性的變化

甜瓜雙單倍體在生根過(guò)程中,吲哚乙酸氧化酶、多酚氧化酶活性呈現(xiàn)升高-下降-升高的趨勢(shì),過(guò)氧化物酶活性呈現(xiàn)逐漸上升的趨勢(shì)(圖5)。其中,IAAO、PPO活性在0~7 d時(shí)上升較快,分別在第7天和第14天時(shí)達(dá)到最大值,為201.55 μg·g-1·h-1、385.00 U·g-1,7~28 d時(shí)變化幅度相對(duì)較小,但其活性均顯著高于第0天;POD活性在0~7 d時(shí)上升較慢,7~28 d時(shí)上升較快,在第28天達(dá)到最大值,為1 105.54 U·g-1,除第0天和第7天差異不顯著外,其他測(cè)定天數(shù)間差異均達(dá)顯著水平。結(jié)果表明,甜瓜雙單倍體在生根過(guò)程中可通過(guò)調(diào)控相關(guān)酶的活性來(lái)促進(jìn)不定根的發(fā)生。

2.5 在誘導(dǎo)生根過(guò)程中多胺類物質(zhì)、內(nèi)源激素含量及關(guān)聯(lián)酶活性的相關(guān)性分析

由甜瓜雙單倍體誘導(dǎo)生根過(guò)程中多胺類物質(zhì)、內(nèi)源激素含量與3種關(guān)聯(lián)酶活性相關(guān)性分析(表1)可見(jiàn),IAA/ABA與Put、Spm、POD呈顯著或極顯著正相關(guān)(r=0.93**、0.86*、0.96**);GA3與IAAO酶活呈極顯著正相關(guān)(r=0.97**);IAA與IAA/ZR呈顯著正相關(guān)(r=0.86*)。Put與Spm、Spd和POD呈顯著或極顯著正相關(guān)(r=0.98**、0.85*、0.91*);Spm與Spd呈顯著正相關(guān)(r=0.83*);IAAO與PPO呈顯著正相關(guān)(r=0.91*)。表明IAA/ABA比值和Put含量對(duì)甜瓜雙單倍體組培苗不定根誘導(dǎo)分化和生長(zhǎng)有重要促進(jìn)作用。

3 討 論

不定根的形成在植物發(fā)育生物學(xué)中是一個(gè)重要的課題[21]。本研究表明,甜瓜雙單倍體組培苗生根與IAA、ABA、ZR、GA3 4種內(nèi)源激素以及IAA/ABA、IAA/ZR的比值密切相關(guān)。其中內(nèi)源激素IAA、ABA含量變化呈現(xiàn)下降-升高的趨勢(shì),與閆帥等[22]對(duì)杜梨組培苗的研究結(jié)果一致;可能是根原基尚未形成時(shí),IAAO酶活性增強(qiáng)促使IAA降解,后期不定根原基的誘導(dǎo)和局部生長(zhǎng)素水平升高同時(shí)發(fā)生;在一定范圍內(nèi)ABA濃度升高可以促進(jìn)不定根的發(fā)生,過(guò)高濃度ABA又會(huì)抑制不定根的發(fā)生,而賀丹等[23]對(duì)牡丹試管苗的研究則與本研究結(jié)果中ABA的變化相反,造成這種差異的原因可能與不同植物種類生根過(guò)程對(duì)ABA的敏感程度以及所設(shè)置的環(huán)境條件不同有關(guān)。本試驗(yàn)結(jié)果中GA3含量呈現(xiàn)升高-下降的趨勢(shì),表明GA3的調(diào)節(jié)作用在根原基的形成后逐步顯現(xiàn),且后期GA3含量降低,在一定程度上促進(jìn)了不定根的形成,與王金祥等[24]對(duì)綠豆插條生根的研究結(jié)果一致。玉米素核苷是天然細(xì)胞分裂素,在植物的生長(zhǎng)過(guò)程中促進(jìn)細(xì)胞分裂和擴(kuò)大[25]。本研究中,ZR含量則呈現(xiàn)下降-升高-下降的變化趨勢(shì),可能與根原基形成前后及根伸長(zhǎng)時(shí)細(xì)胞數(shù)量和分裂速度對(duì)ZR需求量存在差異有關(guān),這在賀丹等[23]對(duì)牡丹試管苗生根的研究中得到了驗(yàn)證。本研究結(jié)果還表明,在誘導(dǎo)生根后期IAA/ABA和IAA/ZR比值增大更有利于甜瓜雙單倍體不定根的發(fā)生和伸長(zhǎng),這與對(duì)菊花[9]、百合[26]組培生根的研究結(jié)果一致。激素作為植物的內(nèi)源信號(hào)在生根過(guò)程中發(fā)揮著作用,內(nèi)源激素之間可能會(huì)存在著一種協(xié)同或拮抗作用,但具體調(diào)控不定根的形成機(jī)制還有待進(jìn)一步研究。

多胺代謝的特征之一是參與了植物的生物和非生物因素脅迫[27],其含量的變化可有效改變關(guān)聯(lián)酶的活性以提高植物體的抗逆性,進(jìn)而調(diào)控生命活動(dòng)[28]。本研究結(jié)果表明,甜瓜雙單倍體在生根過(guò)程中多胺類物質(zhì)脯氨、精氨和亞精胺含量均呈現(xiàn)升高-下降-升高的變化趨勢(shì),后期其含量的升高有利于不定根的形成和伸長(zhǎng),與閆帥等[22]杜梨組培生根的研究結(jié)果一致。這可能是多胺類物質(zhì)在根原基形成前和形成后主要參與對(duì)外界脅迫的抵御,根原基形成過(guò)程中則主要參與不定根根原基的誘導(dǎo),但其具體原因還需進(jìn)一步探討。

植物的生根是一個(gè)復(fù)雜的生理活動(dòng)過(guò)程,體內(nèi)相關(guān)氧化酶如吲哚乙酸氧化酶、多酚氧化酶、過(guò)氧化物酶在這一過(guò)程中發(fā)揮重要作用[29]。在本研究中,IAAO、PPO酶活性在愈傷組織誘導(dǎo)階段逐漸上升,在不定根形成后呈現(xiàn)下降趨勢(shì),在伸長(zhǎng)期又逐漸升高,與王瑞等[11]對(duì)油茶和賀丹等[23]對(duì)牡丹組培苗的研究結(jié)果基本一致,可能與2種酶在生根過(guò)程中調(diào)控有關(guān)激素和多胺類物質(zhì)的形成有關(guān),這在2種酶活性與相關(guān)激素和多胺類物質(zhì)含量的相關(guān)性中也得到了證實(shí);POD活性在生根過(guò)程中則呈現(xiàn)逐漸上升的趨勢(shì),可能與其調(diào)控IAA/ABA的比值有關(guān)。這充分揭示了甜瓜雙單倍體不定根的發(fā)生和伸長(zhǎng)與這3種氧化酶活性有密切關(guān)系。

4 結(jié) 論

甜瓜雙單倍體組培苗生根與IAA、ABA、ZR、GA3以及多胺類物質(zhì)Spm、Spd、Put含量密切相關(guān),一定范圍內(nèi)的IAA、ABA 含量升高及GA3、ZR含量降低有利于不定根誘導(dǎo)分化和生長(zhǎng)發(fā)育,IAA/ABA、IAA/ZR比值升高有利于不定根的發(fā)生;后期組培苗體內(nèi)Spm、Spd、Put含量的升高有利于不定根的形成;其中IAA/ABA的比值及Put含量在誘導(dǎo)生根過(guò)程中發(fā)揮著重要的調(diào)控作用,IAAO、PPO、POD酶活性與不定根的發(fā)生和伸長(zhǎng)也有密切關(guān)系。

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收稿日期:2023-04-12 接受日期:2023-06-26

基金項(xiàng)目:農(nóng)業(yè)農(nóng)村部財(cái)政部:國(guó)家西甜瓜產(chǎn)業(yè)技術(shù)體系建設(shè)項(xiàng)目(CARS-25);河南省西甜瓜產(chǎn)業(yè)技術(shù)體系建設(shè)項(xiàng)目(HARS-22-10-G1);河南省科技攻關(guān)項(xiàng)目(222102110208);河南農(nóng)業(yè)科學(xué)院自主創(chuàng)新項(xiàng)目(2023ZC033)

作者簡(jiǎn)介:趙衛(wèi)星,男,副研究員,博士,主要從事西甜瓜遺傳育種及栽培生理研究。Tel:0371-65748477,E-mail:wxzhao2008@163.com

通信作者Author for correspondence. E-mail:lixiaohui80@126.com

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