广西植物
廣西植物
엄서식물
GUIHAIA
2014年
5期
694-699,613
,共7页
美丽红山茶%水分胁迫%生理响应%抗逆性%特有植物
美麗紅山茶%水分脅迫%生理響應%抗逆性%特有植物
미려홍산다%수분협박%생리향응%항역성%특유식물
Camellia delicata%water stress%physiological response%stress resistance%endemic plant
采用水分抗逆性指标主成分分析法,选择4年实生苗,测定和评价了连续30 d水涝和干旱胁迫的生理响应.结果表明：(1)水涝处理的叶片生长旺盛,光泽度和观赏性无明显变化,叶片相对含水量、MDA含量、SOD活性、POD活性、CAT活性的变化差异在5％以内,土壤含水量增加3．47％,细胞膜透性减少1．59％,短期水涝对美丽红山茶伤害不明显；(2)随着干旱时间延长,新叶卷缩、老叶脱落,土壤含水量、叶片相对含水量随时间呈负相关缓慢减少,细胞膜透性呈正相关缓慢增长,但复水10 d 后可恢复正常生长,无明显生理变化响应；(3)SOD活性和MDA含量分别增加了0．66％和5．31％,POD活性随干旱时间上下波动而增加6．47％, CAT活性随干旱时间延长而增加,20 d增加33．33％达最大值20．8 U??g-1??min-1.在抗性生理中,维持膜稳定性的叶片含水量、POD和CAT的变化对抗旱能力大小起主要作用.
採用水分抗逆性指標主成分分析法,選擇4年實生苗,測定和評價瞭連續30 d水澇和榦旱脅迫的生理響應.結果錶明：(1)水澇處理的葉片生長旺盛,光澤度和觀賞性無明顯變化,葉片相對含水量、MDA含量、SOD活性、POD活性、CAT活性的變化差異在5％以內,土壤含水量增加3．47％,細胞膜透性減少1．59％,短期水澇對美麗紅山茶傷害不明顯；(2)隨著榦旱時間延長,新葉捲縮、老葉脫落,土壤含水量、葉片相對含水量隨時間呈負相關緩慢減少,細胞膜透性呈正相關緩慢增長,但複水10 d 後可恢複正常生長,無明顯生理變化響應；(3)SOD活性和MDA含量分彆增加瞭0．66％和5．31％,POD活性隨榦旱時間上下波動而增加6．47％, CAT活性隨榦旱時間延長而增加,20 d增加33．33％達最大值20．8 U??g-1??min-1.在抗性生理中,維持膜穩定性的葉片含水量、POD和CAT的變化對抗旱能力大小起主要作用.
채용수분항역성지표주성분분석법,선택4년실생묘,측정화평개료련속30 d수로화간한협박적생리향응.결과표명：(1)수로처리적협편생장왕성,광택도화관상성무명현변화,협편상대함수량、MDA함량、SOD활성、POD활성、CAT활성적변화차이재5％이내,토양함수량증가3．47％,세포막투성감소1．59％,단기수로대미려홍산다상해불명현；(2)수착간한시간연장,신협권축、로협탈락,토양함수량、협편상대함수량수시간정부상관완만감소,세포막투성정정상관완만증장,단복수10 d 후가회복정상생장,무명현생리변화향응；(3)SOD활성화MDA함량분별증가료0．66％화5．31％,POD활성수간한시간상하파동이증가6．47％, CAT활성수간한시간연장이증가,20 d증가33．33％체최대치20．8 U??g-1??min-1.재항성생리중,유지막은정성적협편함수량、POD화CAT적변화대항한능력대소기주요작용.
Camellia delicata is Guizhou endemic species and ornamental tree,so research on water stress is very im-portant for the popularize.The paper studied 4-years seedlings,by principal components analysis method of physiolog-ical index,tested and evaluated the physiological response of waterlogged for 30 days and water stress.The results were as follows:(1)When the plants waterlogged,leaves grew well,there were no obvious changes in gloss and orna-mental.The differences of leaf moisture content,MDA,SOD,POD and CAT were under 5%,soil moisture content increased 3.47%,cell membrane permeability decrease 1.59%.The damage to C.delicate short-term waterlogged was not obvious;(2)With drought time extension,new leaves were shriveled,old leaves broke off plant.Soil moisture content and leaf moisture content were negatively related to drought period,decreased slowly.The cell membrane permeability was positively correlated with drought period,grew slowly.But the plants returned to normal growth af-ter watering 10d,and had not obvious physiological change response;(3)The SOD and MDA increased respectively 0.66% and 5.31%,POD fluctuated and increased 6.47%with drought time.CAT activity also increased 33.33% with drought 20 days,reached maximum 20.8 U·g-1·min-1 .In the resistant physiology,which played the leading role in drought were leaf moisture content, POD, CAT.
