Drought stress is one of the major constraints on turf growth and performance in northern China. Based on previous assessments of drought tolerance levels, four varieties of Kentucky bluegrass （Poa pratensis L.） rep...Drought stress is one of the major constraints on turf growth and performance in northern China. Based on previous assessments of drought tolerance levels, four varieties of Kentucky bluegrass （Poa pratensis L.） representing different types （＇Baron＇, BVMG type; ＇Blackstone＇, Cheri type; ＇Kenblue＇, Midwest type; and ＇Bluemoon＇, Midnight type） were chosen for this study. Grass materials were established in a glasshouse, and the changes in their photosynthetic and metabolic characteristics were analyzed during a period of imposed drought stress. Drought stress led to decrease in chlorophyll content, photosynthetic rate, stomatal conductance and transpiration rate in all four cultivars, but the relative changes in each characteristic varied among varieties. The results also showed that changes in the photosynthetic and metabolic characteristics of different varieties under drought stress were related to the morphological characteristics of the plants. Varieties with longer narrow leaves, longer roots, higher root-to-shoot ratios, and higher chlorophyll contents showed greater rates of photosynthesis and stomatal conductance, and lower transpiration rates.展开更多
Improving turfgrass drought resistance and save-water features are very important to solve water deficiency in turfgrass production and management. This research did some surveys of systematic literature review about ...Improving turfgrass drought resistance and save-water features are very important to solve water deficiency in turfgrass production and management. This research did some surveys of systematic literature review about turfgrass drought tolerance morphological characteristics, physiological characteristics and water use efficiency, and provided the detailed information for enhancing turfgrass drought resistant and water use efficiency in the future.展开更多
Objective To observe the clinical efficacy of transcutaneous electrical acupoint stimulation(TEAS)combined with warm acupuncture in treating breast cancer associated with upper limb lymphedema(BCRL).Methods This was a...Objective To observe the clinical efficacy of transcutaneous electrical acupoint stimulation(TEAS)combined with warm acupuncture in treating breast cancer associated with upper limb lymphedema(BCRL).Methods This was a retrospective cohort study using a paired control design.Fifty-two BCRL patients were assigned to the control group(27 cases)and the treatment group(25 cases).The patients in the control group were treated with lymphedema comprehensive detumescence treatment(CDT)for 4 weeks,including systematic therapy composed of manual lymphatic drainage,compression bandage,skincare,and functional exercise.The patients in the treatment group were treated with TEAS combined with warm acupuncture based on the control group methods.Each treatment lasted for 30 min and was applied twice a week for 4 weeks.The arm circumference(AC)of different positions of the affected limb and the degree of swelling of the affected limb were evaluated before the first treatment and after the last treatment.The clinical efficacy was evaluated according to the degree of edema before and after treatment.All adverse events during treatment were recorded.Results The patients’AC and the swelling feeling of the affected limb in the treatment group and the control group were both reduced compared with those before treatment.Compared with the control group,AC of the wrist joint transverse stria,the midpoint between the wrist joint transverse stria and the elbow joint transverse stria in the treatment group were significantly reduced(P<0.05).The decrease in AC diameter at the midpoint between the elbow joint transverse stria and the axillary transverse stria was the most significant(P<0.01).The swelling degree of the affected limbs in the treatment group was significantly lower than before treatment,and was significantly lower compared with the control group after treatment(P<0.01).The total effective rate was 72%in the treatment group,significantly higher than that in the control group(55.56%,P<0.05).No serious adverse events occured in either group.Conclusions TEAS combined with warm acupuncture can effectively reduce AC and swelling feeling of the affected limb in patients with BCRL.The effect is better than that of CDT therapy alone.展开更多
基金Supported by the National Natural Science Foundation of China (30871735 31272191)+1 种基金the Natural Science Foundation of Heilongjiang Province(C0207 C200619)
文摘Drought stress is one of the major constraints on turf growth and performance in northern China. Based on previous assessments of drought tolerance levels, four varieties of Kentucky bluegrass （Poa pratensis L.） representing different types （＇Baron＇, BVMG type; ＇Blackstone＇, Cheri type; ＇Kenblue＇, Midwest type; and ＇Bluemoon＇, Midnight type） were chosen for this study. Grass materials were established in a glasshouse, and the changes in their photosynthetic and metabolic characteristics were analyzed during a period of imposed drought stress. Drought stress led to decrease in chlorophyll content, photosynthetic rate, stomatal conductance and transpiration rate in all four cultivars, but the relative changes in each characteristic varied among varieties. The results also showed that changes in the photosynthetic and metabolic characteristics of different varieties under drought stress were related to the morphological characteristics of the plants. Varieties with longer narrow leaves, longer roots, higher root-to-shoot ratios, and higher chlorophyll contents showed greater rates of photosynthesis and stomatal conductance, and lower transpiration rates.
基金Supported by the National Nature Science Foundation (30871735 31272191)
文摘Improving turfgrass drought resistance and save-water features are very important to solve water deficiency in turfgrass production and management. This research did some surveys of systematic literature review about turfgrass drought tolerance morphological characteristics, physiological characteristics and water use efficiency, and provided the detailed information for enhancing turfgrass drought resistant and water use efficiency in the future.
基金Supported by the Program of Science Research Foundation of Zhejiang Provincial TCM Administration(No.2022ZB058)。
文摘Objective To observe the clinical efficacy of transcutaneous electrical acupoint stimulation(TEAS)combined with warm acupuncture in treating breast cancer associated with upper limb lymphedema(BCRL).Methods This was a retrospective cohort study using a paired control design.Fifty-two BCRL patients were assigned to the control group(27 cases)and the treatment group(25 cases).The patients in the control group were treated with lymphedema comprehensive detumescence treatment(CDT)for 4 weeks,including systematic therapy composed of manual lymphatic drainage,compression bandage,skincare,and functional exercise.The patients in the treatment group were treated with TEAS combined with warm acupuncture based on the control group methods.Each treatment lasted for 30 min and was applied twice a week for 4 weeks.The arm circumference(AC)of different positions of the affected limb and the degree of swelling of the affected limb were evaluated before the first treatment and after the last treatment.The clinical efficacy was evaluated according to the degree of edema before and after treatment.All adverse events during treatment were recorded.Results The patients’AC and the swelling feeling of the affected limb in the treatment group and the control group were both reduced compared with those before treatment.Compared with the control group,AC of the wrist joint transverse stria,the midpoint between the wrist joint transverse stria and the elbow joint transverse stria in the treatment group were significantly reduced(P<0.05).The decrease in AC diameter at the midpoint between the elbow joint transverse stria and the axillary transverse stria was the most significant(P<0.01).The swelling degree of the affected limbs in the treatment group was significantly lower than before treatment,and was significantly lower compared with the control group after treatment(P<0.01).The total effective rate was 72%in the treatment group,significantly higher than that in the control group(55.56%,P<0.05).No serious adverse events occured in either group.Conclusions TEAS combined with warm acupuncture can effectively reduce AC and swelling feeling of the affected limb in patients with BCRL.The effect is better than that of CDT therapy alone.
