CAJ | 학술논문

设置对照(CK)，轻度干旱胁迫(LS)，中度干旱胁迫(MS)和重度干旱胁迫(HS)4种水分处理，采用温室盆栽方法研究降香黄檀(Dalbergia odorifera T. Chen)幼苗生长及叶片内源激素对干旱胁迫的响应。结果表明，①随着干旱胁迫强度增加，幼苗苗高、地径和整株生物量呈递减趋势，重度干旱处理（HS）时三者达到最小值分别是50.83 cm、8.38 mm和26.60 g·株-1，比对照（CK）分别降低了23.67%、13.52%和25.04%。②随着干旱胁迫强度增加，降香黄檀幼苗w(ABA)(以鲜质量计)逐渐增加，重度干旱处理(HS)123.04 ng·g-1比对照(CK)81.26 ng·g-1增加了51.41%；w(IAA)(以鲜质量计)和w(ZR)(以鲜质量计)逐渐减少，其最小值分别是99.49 ng·g-1和8.89 ng·g-1，比对照(CK)分别降低了23.88%和47.50%；w(GA)(以鲜质量计)变化为先增加后降低，重度干旱处理(HS)最小值4.14 ng·g-1比轻度干旱处理(LS)最大值9.39 ng·g-1降低了55.91%。不同处理间各内源激素含量均达到差异显著。③随着干旱胁迫强度增加，幼苗内源激素含量比例IAA/ABA，GA/ABA，ZR/ABA和ZR/IAA呈现递减趋势，最小值分别较对照(CK)降低了46.68%，65.33%，65.34和34.93%，GA/IAA呈现出先增加后降低趋势。④幼苗生长指标变化趋势说明幼苗可以通过降低苗高和减少叶面积等来适应干旱，内源激素含量变化说明幼苗通过调节自身激素水平来响应外界干旱胁迫，但重度干旱严重限制了幼苗生长，说明降香黄檀幼苗的抗旱能力有限。
설치대조(CK)，경도간한협박(LS)，중도간한협박(MS)화중도간한협박(HS)4충수분처리，채용온실분재방법연구강향황단(Dalbergia odorifera T. Chen)유묘생장급협편내원격소대간한협박적향응。결과표명，①수착간한협박강도증가，유묘묘고、지경화정주생물량정체감추세，중도간한처리（HS）시삼자체도최소치분별시50.83 cm、8.38 mm화26.60 g·주-1，비대조（CK）분별강저료23.67%、13.52%화25.04%。②수착간한협박강도증가，강향황단유묘w(ABA)(이선질량계)축점증가，중도간한처리(HS)123.04 ng·g-1비대조(CK)81.26 ng·g-1증가료51.41%；w(IAA)(이선질량계)화w(ZR)(이선질량계)축점감소，기최소치분별시99.49 ng·g-1화8.89 ng·g-1，비대조(CK)분별강저료23.88%화47.50%；w(GA)(이선질량계)변화위선증가후강저，중도간한처리(HS)최소치4.14 ng·g-1비경도간한처리(LS)최대치9.39 ng·g-1강저료55.91%。불동처리간각내원격소함량균체도차이현저。③수착간한협박강도증가，유묘내원격소함량비례IAA/ABA，GA/ABA，ZR/ABA화ZR/IAA정현체감추세，최소치분별교대조(CK)강저료46.68%，65.33%，65.34화34.93%，GA/IAA정현출선증가후강저추세。④유묘생장지표변화추세설명유묘가이통과강저묘고화감소협면적등래괄응간한，내원격소함량변화설명유묘통과조절자신격소수평래향응외계간한협박，단중도간한엄중한제료유묘생장，설명강향황단유묘적항한능력유한。
A greenhouse experiment was conducted to study the growth and endogenous hormone content of Dalbergia odorifera seedlings under water stress. Four treatments were arranged:control (CK), light water stress (LS), moderate water stress (MS) and heavy water stress (HS). The results showed that: ① Seedling height, ground diameter and whole biomass decreased as the drought stress increased, the minimum values were 50.83cm, 8.38mm and 26.60 g?seedling-1, it was decreased by 23.67%, 13.52% and 25.04%compared to the control. ② ABA content increased as the drought stress increased, maximum (HS) increase of 51.41%than the minimum (CK);IAA and ZR content decreased with drought stress increased, the maximum values were 99.49 ng·g-1·FW-1 and 8.89 ng·g-1·FW-1, it was decreased by 23.88%and 47.50%compared to the control;GA content increased under light drought and decreased under heavy drought, the minimum value (HS) decrease of 51.41% than the maximum value (LS). The endogenous hormone content was reached significant differences between different treatments. ③ The ratios of IAA/ABA, GA/ABA, ZR/ABA and ZR/IAA decreased as the drought stress increased, the minimum values were decreased by 46.68%, 65.33%, 65.34 and 34.93%compared to the control. Drought had significant impact on GA/ABA and ZR/ABA ratios, but insignificant impact on ZR/IAA ratio. GA/IAA ratio increased under light drought while decreasing under heavy drought. ④ The trends of growth characteristics indicated seedlings can adapt to drought by reducing the height and leaf area. The changes of endogenous hormone content illustrated seedlings can response to external drought stress through regulating their hormone levels. Severe drought stress has severely limited seedling growth which indicated that drought tolerance of Dalbergia odorifera seedlings was limited.