What is a mesophyte?

Question 2: What are the characteristics of mesophyll? Mesophytes are terrestrial plants with the largest species, the widest distribution and the largest number, and their morphological structure and adaptability are between wet plants and xerophytes. Can't stand severe drought or long-term waterlogging, and can only live in an environment with moderate water conditions. Most plants on land belong to this category. There are usually cuticles on the leaves, the palisade tissues are arranged neatly, and the roots and conducting tissues are more developed than wet plants, which can resist short-term drought. There are intercellular spaces in leaves and there is no complete ventilation system, so it is impossible to live in a waterlogged environment for a long time. Some species, such as coconuts, Shui Rong, poplars and willows, live in a near-humid environment and are called hygrophytes. Some live near xerophytes, which are called xerophytes, such as acacia, Pinus massoniana and various eucalyptus. Real mesophytes are in between, such as camphor tree, litchi and longan.

Question 3: How many types of plants can be divided into? Plants growing on land are collectively called terrestrial plants, which are divided into hygrophytes, mesophytes and xerophytes.

(1) Hydrophytes. Terrestrial plants that grow in humid environment and can't stand long-term water shortage and have the weakest drought resistance are called hygrophytes. Hygrophytes are divided into two subcategories, one is negative hygrophyte and the other is positive hygrophyte. Negative hygrophytes are typical hygrophytes, mainly distributed in the lower layer of humid forests, such as epiphytic ferns and epiphytic orchids in tropical rainforests. These categories are due to extreme leaves. Or because aerial roots are full of roots and can directly absorb water from the air. There are also some negative hygrophytes that grow in the humid environment under tropical forests, such as taro. Begonia evansi Wait. These species have extremely underdeveloped roots, soft leaves and well-developed sponge tissues. However, the fence organization and mechanical organization are underdeveloped. Hygrophytes mainly grow in the environment with sufficient sunshine and saturated soil moisture, such as rice and rushes. ) Nakai, Ranunculus. Wait. Because of the frequent short-term drought in soil, especially the low atmospheric humidity, the hygrophytic morphological structure of this subclass is not obvious. The leaves have cuticle and the conduction tissue is relatively developed, but the roots are underdeveloped and hairless because they adapt to wet soil. Roots, stems and leaves are all interconnected.

(2) mesophytes. Plants that grow on land with moderate moisture and humidity conditions are called mesophytes. Mesophytes have the most species, the widest distribution and the largest number. Most cultivated crops are mesophytes. Due to the reduction of water in the environment, mesophytes have a set of structures and functions to maintain water balance. Their roots and transport tissues are more developed than those of wet plants, their leaves have cuticles on their surfaces, and their palisade tissues are neater than those of wet plants.

(3) xerophytes. Plants that grow in arid environment and can tolerate drought for a long time but still maintain water balance and normal growth and development are called xerophytes. Xerophytes can be divided into two subcategories. A subclass is some serous plants with low water content, such as camel thorn. And ephedra. Another subclass is succulent plants, such as plants of Cactus, Huijiaceae and Sedum.

Low serosity plants have two characteristics, one is that the leaf area is small or even degraded to reduce water transpiration, and the other is that the root system is very developed, which can increase water absorption and ensure water supply to maintain water balance. The main feature of succulent plants is that the parenchyma of roots, stems and leaves become water storage tissues, which makes their stems and leaves fleshy. Some kinds of leaves degenerate into thorns, and green stems replace photosynthesis.

Question 4: What are slow-growing trees, fast-growing trees and middle-growing trees? The plants to be asked are not all trees, nor are they all woody. Some are repetitive, and some names are too biased. Distinguish whether the plants in Chu Yuan are native or not, and find out for yourself whether they grow fast. Some of them are given common names.

Native/fast-growing/slow-growing tree species

Cinnamomum camphora is local and grows rapidly.

Qiu Feng is a native and has developed rapidly.

Pukui is a native and grows slowly.

Introduction of Huanghuai (native to Indian subcontinent, Indonesia and Australia)

Pot frame sugar gum tree, native land

Melia azedarach

Introduction experiment of Australian foxtail coconut

Introduction of frangipani (South America)

Ficus pendula, Ficus pendula, native

Su tie Xiang tu

Zhu Jin safflower and local culture.

Colorful safflower variety Zhu Jin

Albizia Albizia, Rosa laevigata, introduction (South America)

Forsythia suspensa, introduction (South America)

Varieties and Introduction of Lantana Five-color Plum (Tropical America)

Fujian Tea Base, Trees and Native Land

All over the sky: Cao Xia, Changke and local culture.

Luohansong homeland

Local redwood and safflower wood

Ball jasmine is jasmine? Introduction (India)

Introduction of Coconut King (Madagascar)

Introduction of Triangle Coconut (Madagascar)

Local Bambusa microphylla

Introduction of Cicadellidae (Brazil)

Introduction of Ficus mosaic (tropical Asia)

Qian Jin Xiang Rong tu

Cassia and its introduction (India, zhina Peninsula, Australia)

Introduction of Celosia cristata (Africa)

Mulan homeland

Lespedeza bougainvillea, bougainvillea bougainvillea, introduction (tropical America)

Herbs in Taiwan Province Province, Zoysia tenuifolia, native place.

Cultivars and native land of Lagerstroemia microphylla

There are the following tree species, ***5 1 species:

Introduction of Peach Blossoms (Tropical America)

Hong Bei GUI Xiang tu

Amaranth, Amaranth, Herbs, Introduction (Brazil)

Spider orchid water ghost banana, herb, introduction (tropical America)

Introduction of Platanus acerifolia (Madagascar)

Introduction experiment of Australian foxtail coconut

Introduction and introduction of exotic kapok (tropical America)

Du Ying with sharp leaves, Du Ying with long awns, and local culture.

Introduction of Platycladus orientalis (South America)

Impression, hometown

Hainan grape hometown

Cultivars and producing areas of Ficus microcarpa.

The basic tree is the basic tree above, Fujian tea and local culture.

Introduction of Mango (India)

It's already on the cycad

Question 5: The difference between dicotyledonous plants (mesophytes) and oleander plants (xerophytes) and their classification. Different terrestrial plants include three types: hygrophytes, mesophytes and xerophytes. 1. Arid mesophytes belong to mesophytes. Mostly distributed in mountains, wetlands and sandy land; Plants growing in places with moderate humidity. Common forest and grassland plants belong to this category. Most cultivated plants (crops, grasses, vegetables, fruit trees) are also mesophytes. Their morphological anatomy and physiological characteristics are between xerophytes and hygrophytes. The leaves of plants are flat and broad, the mechanical tissue and palisade tissue are moderately developed, the epidermis is thin, and the cuticle is weakly developed. Stomata mainly appear on the lower surface of leaves, and the osmotic pressure is higher than that of wet plants, but lower than that of dry plants. 2. Moderately xerophytes belong to xerophytes. More common in grassland vegetation, but also in mountains, farmland and sandy land. Drought-loving plants are particularly strong in water absorption and storage, and have a large amount of slurry.

Question 6: Characteristics of xerophytes, mesophytes, hygrophytes and aquatic plants 1. Xerophytes: suitable for arid and rainy areas, not tolerant of waterlogging and strong drought resistance.

2. Mesophytes: This kind of plants has the most varieties and has good adaptability to drought and waterlogging.

3. Moist plants: The environment suitable for growth is the river bank or the place with high groundwater level.

4. Aquatic plants: plants suitable for growing in shallow water or floating in deep water.

Question 7: Is the lotus magnolia a xerophyte or a mesophyte?

Question 8: What perennial plants grow fastest? "Perennial" and "herb" need no explanation.

mesophyte

The morphological structure and adaptability are between wet plants and xerophytes, and it is a terrestrial plant with the largest species, the widest distribution and the largest number. Can't stand severe drought or long-term waterlogging, and can only live in an environment with moderate water conditions. Most plants on land belong to this category. There are usually cuticles on the leaves, the palisade tissues are arranged neatly, and the roots and conducting tissues are more developed than wet plants, which can resist short-term drought. There are intercellular spaces in leaves and there is no complete ventilation system, so it is impossible to live in a waterlogged environment for a long time. Some species, such as coconuts, Shui Rong, poplars and willows, live in a near-humid environment and are called hygrophytes. Some live near xerophytes, which are called xerophytes, such as acacia, Pinus massoniana and various eucalyptus. Real mesophytes are in between, such as camphor tree, litchi and longan.