广西植物
廣西植物
엄서식물
GUIHAIA
2014年
1期
111-115
,共5页
蒿属植物%非直角双曲线%光响应曲线%适应
蒿屬植物%非直角雙麯線%光響應麯線%適應
호속식물%비직각쌍곡선%광향응곡선%괄응
sagebrush species%non-rectangle hyperbolae%light response curve%adaption
对中国四种蒿属植物(毛莲蒿、蒙古蒿、牡蒿和灰苞蒿)的光合响应曲线进行了研究.结果表明：牡蒿具有高光饱点(411．0μmol??m-2??s-1)和最大光合速率(18．627μmol??m-2??s-1)，以及较低的光补偿点(17．867μmol??m-2??s-1)，对高光的适应能力最强；灰苞蒿的暗呼吸速率(0．353μmol??m-2??s-1)和表观量子效率(0．038)最低，说明该种对弱光的适应能力较差，且在弱光条件下只能维持较低的生长速率；灰苞蒿水分利用效率随光强的变化趋势与其他三种蒿属植物一致，但总体上维持在一个较高的水平，可能与其对干旱生境的适应有关.光合响应曲线各个拟合指标在种间呈现出了较大的变异，其中光补偿点(Lcpμmol??m-2??s-1)和暗呼吸速率(Rdayμmol??m-2??s-1)差异达到了显著水平.说明植物功能性状与植物对环境长期适应密切相关，并且这种适应性是稳定可遗传的.
對中國四種蒿屬植物(毛蓮蒿、矇古蒿、牡蒿和灰苞蒿)的光閤響應麯線進行瞭研究.結果錶明：牡蒿具有高光飽點(411．0μmol??m-2??s-1)和最大光閤速率(18．627μmol??m-2??s-1)，以及較低的光補償點(17．867μmol??m-2??s-1)，對高光的適應能力最彊；灰苞蒿的暗呼吸速率(0．353μmol??m-2??s-1)和錶觀量子效率(0．038)最低，說明該種對弱光的適應能力較差，且在弱光條件下隻能維持較低的生長速率；灰苞蒿水分利用效率隨光彊的變化趨勢與其他三種蒿屬植物一緻，但總體上維持在一箇較高的水平，可能與其對榦旱生境的適應有關.光閤響應麯線各箇擬閤指標在種間呈現齣瞭較大的變異，其中光補償點(Lcpμmol??m-2??s-1)和暗呼吸速率(Rdayμmol??m-2??s-1)差異達到瞭顯著水平.說明植物功能性狀與植物對環境長期適應密切相關，併且這種適應性是穩定可遺傳的.
대중국사충호속식물(모련호、몽고호、모호화회포호)적광합향응곡선진행료연구.결과표명：모호구유고광포점(411．0μmol??m-2??s-1)화최대광합속솔(18．627μmol??m-2??s-1)，이급교저적광보상점(17．867μmol??m-2??s-1)，대고광적괄응능력최강；회포호적암호흡속솔(0．353μmol??m-2??s-1)화표관양자효솔(0．038)최저，설명해충대약광적괄응능력교차，차재약광조건하지능유지교저적생장속솔；회포호수분이용효솔수광강적변화추세여기타삼충호속식물일치，단총체상유지재일개교고적수평，가능여기대간한생경적괄응유관.광합향응곡선각개의합지표재충간정현출료교대적변이，기중광보상점(Lcpμmol??m-2??s-1)화암호흡속솔(Rdayμmol??m-2??s-1)차이체도료현저수평.설명식물공능성상여식물대배경장기괄응밀절상관，병차저충괄응성시은정가유전적.
The light curves of Artemisia vestita,A.mongolica,A.japonica and A.roxburghiana were measured, and parameters of photosynthesis were calculated by non-rectangle hyperbolae function.Our results showed that A. japonica had higher light saturation point(411.0μmol??m-2??s-1),higher maximum net photosynthetic rate(18.627μmol??m-2??s-1)and lower light compensation point(17.867μmol??m-2??s-1)than other species,revealing a higher ability to adapt highlight conditions for A.japonica.A.roxburghiana had the lowest values of dark respiration (0.353μmol??m-2??s-1 )and apparent quantum yield(0.038),indicating this species only maintained a low growth rate under low light conditions.Although the four species had similar trends in water use efficiency in response to in-creasing light densities,A.roxburghiana exhibited higher levels of WUE than those of other species,which might be reflected an adaptation to drought conditions.Furthermore,the parameters derived from light response curves exhibi-ted a higher variation among species,especially for Lcp and Rday .Overall,those results confirmed the hypothesis that the expression of plant functional traits was closely related to the long-term adaptation of plants to environment and survival strategy.
