馬藺[irislacteapall.var.chinensis(fisch.)koidz]的繁殖及抗旱耐鹽特性的研究

1、青海大學(xué)碩士學(xué)位論文馬藺[Iris lactea Pall.var.chinensis（Fisch.）koidz]的繁殖及抗旱耐鹽特性的研究姓名：張英申請學(xué)位級別：碩士專業(yè)：草業(yè)科學(xué)指導(dǎo)教師：孫海群20090401II Abstract Wild Iris lacteal Pall.var.chinensis(Fisch.)Koidz herbage in arctic-alpine area has been chosen, and

2、its reproductive character, drought-resistance and salt-resistance have been tested, the main conclusion was gained as follows: 1. Based on observing biological characteristic, growth regulation and carrying out ramet re

3、production experiment to Iris lacteal Pall.var.chinensis(Fisch.)Koidz , the result showed better effect on reproduction using two-ramet reproduction method in Summer or Autumn. 2. According to researching seed characteri

4、stic of Iris lacteal Pall.var.chinensis indicated: 1)The weight of thousand-seeds is 22.37±1.06g, the rate of living-seed is 78.5%, the rate of undynamic seed and wizened seed is 20% and 1.5% respectively. 2) It is

5、difficult for seeds of Iris lacteal Pall.var.chinensis(Fisch.)Koidz to germinate in normal condition which present integration dormancy phenomenon. 3) It can be improved germination potential, germination efficiency, ger

6、mination exponent and energy exponent of Iris lacteal Pall.var.chinensis seed to frazzle seed capsule, dip seed into GA3 solution or strong H2SO4. From the experiment above showed that treating seeds with strong H2SO4 pr

7、esent highest germination efficiency. 3. The seedlings of Iris lacteal Pall.var.chinensis(Fisch.)Koidz were treated with water-stress, namely not supplied water within 0 days, 3 days, 6 days, 9 days, 12 days, 15 days, 18

8、 days, and 21 days, arranged 3 repetitions. Different physiology and bio-chemistry indexes were measured and analysed periodically including dissociative-Pro, dissoluble-sugar, MDA, chlorophyll content, electric conducti

9、vity and relative-water content of plant under water stress. The results indicated that: 1)Along with time of water stress, relative-water-content and chlorophyll content were reported to descend, whereas electric conduc

10、tivity and MDA content increased gradually; Moreover, dissoluble-sugar and dissociative-Pro increased firstly then decreased with the treated time of water stress. 2) Meanwhile, the Pearson correlation analysis among the

11、 different physiological indexes was conducted and the result showed that different physiological indexes presented significantly correlation with each other. 4. The roots of Iris lacteal Pall.var.chinensis(Fisch.)Koidz

12、seedling were treated with different concentration grads of NaCl solution including 0, 0.3%, 0.6% and 0.9% , and the treating time is 0 day, 4 days, 8 days and 12 days , arranged 3 repitions. Different physiological and

13、bio-chemistry indexes were measured and analysed periodically including dissociative-Pro, dissoluble-sugar, MDA, chlorophyll content, electric conductivity. The results indicated: 1) Along with the salt concentration and

14、 the time of salt stress, the chlorophyll content were reported to descend, whereas electric conductivity, dissoluble-sugar and MDA content increased gradually; Moreover, dissociative-Pro increased firstly then decreased

15、 with the treated time of salt stress. 2) Different salt concentration and salt-stress time reduced profound effect on the growth of Iris lacteal Pall.var.chinensis(Fisch.)Koidz. Seedlings keep normal growth situation be