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首页> 外文期刊>Tropical Science >The effect of moisture stress on growth, leaf water loss rate and phenological development of tef (Eragrostis tef).
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The effect of moisture stress on growth, leaf water loss rate and phenological development of tef (Eragrostis tef).

机译：水分胁迫对特夫（Eragrostis tef）的生长，叶片失水率和物候发育的影响。

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摘要

Six tef genotypes with different drought tolerances were subjected to early or late water stress. Early stress significantly reduced plant height and increased the average time to heading and maturity, while late stress decreased the time to maturity. Under water stress, the drought-tolerant genotypes (DZ-01-1015 and DZ-Cr-37) had the lowest excised-leaf water loss (ELWL) and relative growth rate (RGR), while under optimum moisture conditions they had the highest RGR and intermediate ELWL. The RGRof the drought-sensitive cv. Trotteriana was intermediate, while its ELWL was significantly higher than for the other genotypes at all stages of growth. RGR was not correlated with grain yield but it was significantly correlated with the drought susceptibility index (DSI) at the jointing and heading stages under early stress. ELWL was negatively and significantly correlated with grain yield at heading and grain filling under early stress. It was also positively and significantly correlated with DSI bothat jointing and heading under early stress and at heading under late stress.
机译：六种不同耐旱性的特氟基因型受到了早期或晚期水分胁迫。早期胁迫显着降低了株高，增加了抽穗和成熟的平均时间，而晚期胁迫则缩短了成熟时间。在水分胁迫下，耐旱基因型（DZ-01-1015和DZ-Cr-37）的切叶失水量（ELWL）和相对生长率（RGR）最低，而在最佳水分条件下，其最高RGR和中间ELWL。对干旱敏感的简历的RGR。 Trotteriana处于中等水平，而其ELWL在所有生长阶段均显着高于其他基因型。 RGR与籽粒产量无关，但与拔节期和抽穗期干旱胁迫下的干旱敏感性指数（DSI）显着相关。 ELWL与早期胁迫下抽穗和结实时的籽粒产量呈负相关且显着相关。在早期应力下的拔节和抽and以及后期应力下的抽ing，它也与DSI呈显着正相关。

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